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Finding the Fourth Proportional to 68,534.20, 102,801.30 and 65,909.80

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Solution

The fourth proportional to 68,534.20, 102,801.30 and 65,909.80 is: 98,864.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,534.20 : 102,801.30 = 65,909.80 : x
  2. Step 2: Convert to fraction form
    68,534.20/102,801.30 = 65,909.80/x
  3. Step 3: Cross multiply
    68,534.20x = 102,801.30 × 65,909.80
  4. Step 4: Simplify right side
    68,534.20x = 6,775,613,122.74
  5. Step 5: Solve for x
    x = 6,775,613,122.74/68,534.20
  6. Step 6: Final answer
    x = 98,864.70

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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.