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Finding the Fourth Proportional to 89,369.52, 123,387.78 and 55,414.20

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Solution

The fourth proportional to 89,369.52, 123,387.78 and 55,414.20 is: 76,507.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,369.52 : 123,387.78 = 55,414.20 : x
  2. Step 2: Convert to fraction form
    89,369.52/123,387.78 = 55,414.20/x
  3. Step 3: Cross multiply
    89,369.52x = 123,387.78 × 55,414.20
  4. Step 4: Simplify right side
    89,369.52x = 6,837,435,118.48
  5. Step 5: Solve for x
    x = 6,837,435,118.48/89,369.52
  6. Step 6: Final answer
    x = 76,507.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.