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Finding the Fourth Proportional to 101,909.88, 152,665.92 and 66,742.92

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Solution

The fourth proportional to 101,909.88, 152,665.92 and 66,742.92 is: 99,984.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,909.88 : 152,665.92 = 66,742.92 : x
  2. Step 2: Convert to fraction form
    101,909.88/152,665.92 = 66,742.92/x
  3. Step 3: Cross multiply
    101,909.88x = 152,665.92 × 66,742.92
  4. Step 4: Simplify right side
    101,909.88x = 10,189,369,285.29
  5. Step 5: Solve for x
    x = 10,189,369,285.29/101,909.88
  6. Step 6: Final answer
    x = 99,984.12

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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.