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Finding the Fourth Proportional to 99,434.39, 137,219.46 and 54,722.39

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Solution

The fourth proportional to 99,434.39, 137,219.46 and 54,722.39 is: 75,516.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,434.39 : 137,219.46 = 54,722.39 : x
  2. Step 2: Convert to fraction form
    99,434.39/137,219.46 = 54,722.39/x
  3. Step 3: Cross multiply
    99,434.39x = 137,219.46 × 54,722.39
  4. Step 4: Simplify right side
    99,434.39x = 7,508,976,805.71
  5. Step 5: Solve for x
    x = 7,508,976,805.71/99,434.39
  6. Step 6: Final answer
    x = 75,516.90

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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.