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Finding the Fourth Proportional to 71,129.16, 98,149.88 and 39,296.16

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Solution

The fourth proportional to 71,129.16, 98,149.88 and 39,296.16 is: 54,224.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,129.16 : 98,149.88 = 39,296.16 : x
  2. Step 2: Convert to fraction form
    71,129.16/98,149.88 = 39,296.16/x
  3. Step 3: Cross multiply
    71,129.16x = 98,149.88 × 39,296.16
  4. Step 4: Simplify right side
    71,129.16x = 3,856,913,191.98
  5. Step 5: Solve for x
    x = 3,856,913,191.98/71,129.16
  6. Step 6: Final answer
    x = 54,224.08

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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.