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Finding the Fourth Proportional to 71,447.31, 98,602.25 and 39,619.17

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Solution

The fourth proportional to 71,447.31, 98,602.25 and 39,619.17 is: 54,677.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,447.31 : 98,602.25 = 39,619.17 : x
  2. Step 2: Convert to fraction form
    71,447.31/98,602.25 = 39,619.17/x
  3. Step 3: Cross multiply
    71,447.31x = 98,602.25 × 39,619.17
  4. Step 4: Simplify right side
    71,447.31x = 3,906,539,107.04
  5. Step 5: Solve for x
    x = 3,906,539,107.04/71,447.31
  6. Step 6: Final answer
    x = 54,677.20

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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.