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Finding the Fourth Proportional to 71,260.62, 98,342.55 and 39,429

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Solution

The fourth proportional to 71,260.62, 98,342.55 and 39,429 is: 54,413.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,260.62 : 98,342.55 = 39,429 : x
  2. Step 2: Convert to fraction form
    71,260.62/98,342.55 = 39,429/x
  3. Step 3: Cross multiply
    71,260.62x = 98,342.55 × 39,429
  4. Step 4: Simplify right side
    71,260.62x = 3,877,548,403.95
  5. Step 5: Solve for x
    x = 3,877,548,403.95/71,260.62
  6. Step 6: Final answer
    x = 54,413.62

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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.