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Finding the Fourth Proportional to 123,561.70, 185,342.55 and 115,267.30

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Solution

The fourth proportional to 123,561.70, 185,342.55 and 115,267.30 is: 172,900.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,561.70 : 185,342.55 = 115,267.30 : x
  2. Step 2: Convert to fraction form
    123,561.70/185,342.55 = 115,267.30/x
  3. Step 3: Cross multiply
    123,561.70x = 185,342.55 × 115,267.30
  4. Step 4: Simplify right side
    123,561.70x = 21,363,935,313.62
  5. Step 5: Solve for x
    x = 21,363,935,313.62/123,561.70
  6. Step 6: Final answer
    x = 172,900.95

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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.