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Finding the Fourth Proportional to 159,489.60, 239,015.70 and 129,965.10

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Solution

The fourth proportional to 159,489.60, 239,015.70 and 129,965.10 is: 194,769.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,489.60 : 239,015.70 = 129,965.10 : x
  2. Step 2: Convert to fraction form
    159,489.60/239,015.70 = 129,965.10/x
  3. Step 3: Cross multiply
    159,489.60x = 239,015.70 × 129,965.10
  4. Step 4: Simplify right side
    159,489.60x = 31,063,699,352.07
  5. Step 5: Solve for x
    x = 31,063,699,352.07/159,489.60
  6. Step 6: Final answer
    x = 194,769.44

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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.