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Finding the Fourth Proportional to 78,262.32, 108,000.12 and 42,451.44

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Solution

The fourth proportional to 78,262.32, 108,000.12 and 42,451.44 is: 58,581.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,262.32 : 108,000.12 = 42,451.44 : x
  2. Step 2: Convert to fraction form
    78,262.32/108,000.12 = 42,451.44/x
  3. Step 3: Cross multiply
    78,262.32x = 108,000.12 × 42,451.44
  4. Step 4: Simplify right side
    78,262.32x = 4,584,760,614.17
  5. Step 5: Solve for x
    x = 4,584,760,614.17/78,262.32
  6. Step 6: Final answer
    x = 58,581.97

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1.5x scale

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.