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Finding the Fourth Proportional to 79,882.56, 119,169.65 and 77,710.77

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Solution

The fourth proportional to 79,882.56, 119,169.65 and 77,710.77 is: 115,929.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,882.56 : 119,169.65 = 77,710.77 : x
  2. Step 2: Convert to fraction form
    79,882.56/119,169.65 = 77,710.77/x
  3. Step 3: Cross multiply
    79,882.56x = 119,169.65 × 77,710.77
  4. Step 4: Simplify right side
    79,882.56x = 9,260,765,456.41
  5. Step 5: Solve for x
    x = 9,260,765,456.41/79,882.56
  6. Step 6: Final answer
    x = 115,929.75

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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.