Home / 99,761.72-137,666.87-54,438.57

Finding the Fourth Proportional to 99,761.72, 137,666.87 and 54,438.57

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Solution

The fourth proportional to 99,761.72, 137,666.87 and 54,438.57 is: 75,122.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,761.72 : 137,666.87 = 54,438.57 : x
  2. Step 2: Convert to fraction form
    99,761.72/137,666.87 = 54,438.57/x
  3. Step 3: Cross multiply
    99,761.72x = 137,666.87 × 54,438.57
  4. Step 4: Simplify right side
    99,761.72x = 7,494,387,266.98
  5. Step 5: Solve for x
    x = 7,494,387,266.98/99,761.72
  6. Step 6: Final answer
    x = 75,122.88

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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.