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Finding the Fourth Proportional to 71,318.57, 98,409.17 and 39,487.38

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Solution

The fourth proportional to 71,318.57, 98,409.17 and 39,487.38 is: 54,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,318.57 : 98,409.17 = 39,487.38 : x
  2. Step 2: Convert to fraction form
    71,318.57/98,409.17 = 39,487.38/x
  3. Step 3: Cross multiply
    71,318.57x = 98,409.17 × 39,487.38
  4. Step 4: Simplify right side
    71,318.57x = 3,885,920,093.84
  5. Step 5: Solve for x
    x = 3,885,920,093.84/71,318.57
  6. Step 6: Final answer
    x = 54,486.80

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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.