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Finding the Fourth Proportional to 218,423.10, 327,634.65 and 129,630.90

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Solution

The fourth proportional to 218,423.10, 327,634.65 and 129,630.90 is: 194,446.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,423.10 : 327,634.65 = 129,630.90 : x
  2. Step 2: Convert to fraction form
    218,423.10/327,634.65 = 129,630.90/x
  3. Step 3: Cross multiply
    218,423.10x = 327,634.65 × 129,630.90
  4. Step 4: Simplify right side
    218,423.10x = 42,471,574,550.69
  5. Step 5: Solve for x
    x = 42,471,574,550.69/218,423.10
  6. Step 6: Final answer
    x = 194,446.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.