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Finding the Fourth Proportional to 65,710.80, 98,436.60 and 39,337.20

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Solution

The fourth proportional to 65,710.80, 98,436.60 and 39,337.20 is: 58,928.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,710.80 : 98,436.60 = 39,337.20 : x
  2. Step 2: Convert to fraction form
    65,710.80/98,436.60 = 39,337.20/x
  3. Step 3: Cross multiply
    65,710.80x = 98,436.60 × 39,337.20
  4. Step 4: Simplify right side
    65,710.80x = 3,872,220,221.52
  5. Step 5: Solve for x
    x = 3,872,220,221.52/65,710.80
  6. Step 6: Final answer
    x = 58,928.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.