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Finding the Fourth Proportional to 79,687.72, 119,387.38 and 57,380.32

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Solution

The fourth proportional to 79,687.72, 119,387.38 and 57,380.32 is: 85,966.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,687.72 : 119,387.38 = 57,380.32 : x
  2. Step 2: Convert to fraction form
    79,687.72/119,387.38 = 57,380.32/x
  3. Step 3: Cross multiply
    79,687.72x = 119,387.38 × 57,380.32
  4. Step 4: Simplify right side
    79,687.72x = 6,850,486,068.36
  5. Step 5: Solve for x
    x = 6,850,486,068.36/79,687.72
  6. Step 6: Final answer
    x = 85,966.65

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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.