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Finding the Fourth Proportional to 71,551.89, 98,740.22 and 39,720.11

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Solution

The fourth proportional to 71,551.89, 98,740.22 and 39,720.11 is: 54,812.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,551.89 : 98,740.22 = 39,720.11 : x
  2. Step 2: Convert to fraction form
    71,551.89/98,740.22 = 39,720.11/x
  3. Step 3: Cross multiply
    71,551.89x = 98,740.22 × 39,720.11
  4. Step 4: Simplify right side
    71,551.89x = 3,921,971,707.52
  5. Step 5: Solve for x
    x = 3,921,971,707.52/71,551.89
  6. Step 6: Final answer
    x = 54,812.97

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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.