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Finding the Fourth Proportional to 103,685.52, 143,130.16 and 69,713.72

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Solution

The fourth proportional to 103,685.52, 143,130.16 and 69,713.72 is: 96,234.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,685.52 : 143,130.16 = 69,713.72 : x
  2. Step 2: Convert to fraction form
    103,685.52/143,130.16 = 69,713.72/x
  3. Step 3: Cross multiply
    103,685.52x = 143,130.16 × 69,713.72
  4. Step 4: Simplify right side
    103,685.52x = 9,978,135,897.80
  5. Step 5: Solve for x
    x = 9,978,135,897.80/103,685.52
  6. Step 6: Final answer
    x = 96,234.61

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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.