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Finding the Fourth Proportional to 79,881.31, 119,167.79 and 77,709.52

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Solution

The fourth proportional to 79,881.31, 119,167.79 and 77,709.52 is: 115,927.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,881.31 : 119,167.79 = 77,709.52 : x
  2. Step 2: Convert to fraction form
    79,881.31/119,167.79 = 77,709.52/x
  3. Step 3: Cross multiply
    79,881.31x = 119,167.79 × 77,709.52
  4. Step 4: Simplify right side
    79,881.31x = 9,260,471,760.36
  5. Step 5: Solve for x
    x = 9,260,471,760.36/79,881.31
  6. Step 6: Final answer
    x = 115,927.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.