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Finding the Fourth Proportional to 61,915.52, 85,413.12 and 36,747.20

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Solution

The fourth proportional to 61,915.52, 85,413.12 and 36,747.20 is: 50,693.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,915.52 : 85,413.12 = 36,747.20 : x
  2. Step 2: Convert to fraction form
    61,915.52/85,413.12 = 36,747.20/x
  3. Step 3: Cross multiply
    61,915.52x = 85,413.12 × 36,747.20
  4. Step 4: Simplify right side
    61,915.52x = 3,138,693,003.26
  5. Step 5: Solve for x
    x = 3,138,693,003.26/61,915.52
  6. Step 6: Final answer
    x = 50,693.15

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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.