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Finding the Fourth Proportional to 65,909.72, 98,822.68 and 55,917.91

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Solution

The fourth proportional to 65,909.72, 98,822.68 and 55,917.91 is: 83,841.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,909.72 : 98,822.68 = 55,917.91 : x
  2. Step 2: Convert to fraction form
    65,909.72/98,822.68 = 55,917.91/x
  3. Step 3: Cross multiply
    65,909.72x = 98,822.68 × 55,917.91
  4. Step 4: Simplify right side
    65,909.72x = 5,525,957,726.20
  5. Step 5: Solve for x
    x = 5,525,957,726.20/65,909.72
  6. Step 6: Final answer
    x = 83,841.32

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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.