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Finding the Fourth Proportional to 89,775.66, 123,890.80 and 49,488.56

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Solution

The fourth proportional to 89,775.66, 123,890.80 and 49,488.56 is: 68,294.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,775.66 : 123,890.80 = 49,488.56 : x
  2. Step 2: Convert to fraction form
    89,775.66/123,890.80 = 49,488.56/x
  3. Step 3: Cross multiply
    89,775.66x = 123,890.80 × 49,488.56
  4. Step 4: Simplify right side
    89,775.66x = 6,131,176,669.79
  5. Step 5: Solve for x
    x = 6,131,176,669.79/89,775.66
  6. Step 6: Final answer
    x = 68,294.42

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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.