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Finding the Fourth Proportional to 99,761.79, 137,674.19 and 54,442.70

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Solution

The fourth proportional to 99,761.79, 137,674.19 and 54,442.70 is: 75,132.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,761.79 : 137,674.19 = 54,442.70 : x
  2. Step 2: Convert to fraction form
    99,761.79/137,674.19 = 54,442.70/x
  3. Step 3: Cross multiply
    99,761.79x = 137,674.19 × 54,442.70
  4. Step 4: Simplify right side
    99,761.79x = 7,495,353,867.49
  5. Step 5: Solve for x
    x = 7,495,353,867.49/99,761.79
  6. Step 6: Final answer
    x = 75,132.51

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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.