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Finding the Fourth Proportional to 79,489.28, 119,141.76 and 74,881.28

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Solution

The fourth proportional to 79,489.28, 119,141.76 and 74,881.28 is: 112,235.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,489.28 : 119,141.76 = 74,881.28 : x
  2. Step 2: Convert to fraction form
    79,489.28/119,141.76 = 74,881.28/x
  3. Step 3: Cross multiply
    79,489.28x = 119,141.76 × 74,881.28
  4. Step 4: Simplify right side
    79,489.28x = 8,921,487,490.25
  5. Step 5: Solve for x
    x = 8,921,487,490.25/79,489.28
  6. Step 6: Final answer
    x = 112,235.10

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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.