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Finding the Fourth Proportional to 103,685.88, 143,089.74 and 58,976.76

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Solution

The fourth proportional to 103,685.88, 143,089.74 and 58,976.76 is: 81,389.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,685.88 : 143,089.74 = 58,976.76 : x
  2. Step 2: Convert to fraction form
    103,685.88/143,089.74 = 58,976.76/x
  3. Step 3: Cross multiply
    103,685.88x = 143,089.74 × 58,976.76
  4. Step 4: Simplify right side
    103,685.88x = 8,438,969,254.44
  5. Step 5: Solve for x
    x = 8,438,969,254.44/103,685.88
  6. Step 6: Final answer
    x = 81,389.76

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Half scale
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Double scale
Find fourth proportional to 103,686.88, 143,091.12 and 58,977.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.