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Finding the Fourth Proportional to 71,117.78, 98,138.91 and 39,280.52

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Solution

The fourth proportional to 71,117.78, 98,138.91 and 39,280.52 is: 54,205.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,117.78 : 98,138.91 = 39,280.52 : x
  2. Step 2: Convert to fraction form
    71,117.78/98,138.91 = 39,280.52/x
  3. Step 3: Cross multiply
    71,117.78x = 98,138.91 × 39,280.52
  4. Step 4: Simplify right side
    71,117.78x = 3,854,947,417.03
  5. Step 5: Solve for x
    x = 3,854,947,417.03/71,117.78
  6. Step 6: Final answer
    x = 54,205.11

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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.