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Finding the Fourth Proportional to 103,640.74, 143,024.20 and 58,928.74

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Solution

The fourth proportional to 103,640.74, 143,024.20 and 58,928.74 is: 81,321.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.74 : 143,024.20 = 58,928.74 : x
  2. Step 2: Convert to fraction form
    103,640.74/143,024.20 = 58,928.74/x
  3. Step 3: Cross multiply
    103,640.74x = 143,024.20 × 58,928.74
  4. Step 4: Simplify right side
    103,640.74x = 8,428,235,895.51
  5. Step 5: Solve for x
    x = 8,428,235,895.51/103,640.74
  6. Step 6: Final answer
    x = 81,321.65

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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.