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Finding the Fourth Proportional to 76,882.52, 115,282.76 and 39,427.40

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Solution

The fourth proportional to 76,882.52, 115,282.76 and 39,427.40 is: 59,120.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,882.52 : 115,282.76 = 39,427.40 : x
  2. Step 2: Convert to fraction form
    76,882.52/115,282.76 = 39,427.40/x
  3. Step 3: Cross multiply
    76,882.52x = 115,282.76 × 39,427.40
  4. Step 4: Simplify right side
    76,882.52x = 4,545,299,491.62
  5. Step 5: Solve for x
    x = 4,545,299,491.62/76,882.52
  6. Step 6: Final answer
    x = 59,120.06

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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.