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Finding the Fourth Proportional to 100,859.30, 151,337.55 and 71,213.30

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Solution

The fourth proportional to 100,859.30, 151,337.55 and 71,213.30 is: 106,854.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,859.30 : 151,337.55 = 71,213.30 : x
  2. Step 2: Convert to fraction form
    100,859.30/151,337.55 = 71,213.30/x
  3. Step 3: Cross multiply
    100,859.30x = 151,337.55 × 71,213.30
  4. Step 4: Simplify right side
    100,859.30x = 10,777,246,349.42
  5. Step 5: Solve for x
    x = 10,777,246,349.42/100,859.30
  6. Step 6: Final answer
    x = 106,854.26

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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.