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Finding the Fourth Proportional to 89,655.65, 123,724.80 and 49,369.29

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Solution

The fourth proportional to 89,655.65, 123,724.80 and 49,369.29 is: 68,129.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,655.65 : 123,724.80 = 49,369.29 : x
  2. Step 2: Convert to fraction form
    89,655.65/123,724.80 = 49,369.29/x
  3. Step 3: Cross multiply
    89,655.65x = 123,724.80 × 49,369.29
  4. Step 4: Simplify right side
    89,655.65x = 6,108,205,531.39
  5. Step 5: Solve for x
    x = 6,108,205,531.39/89,655.65
  6. Step 6: Final answer
    x = 68,129.63

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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.