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Finding the Fourth Proportional to 143,294.80, 214,942.20 and 129,516.70

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Solution

The fourth proportional to 143,294.80, 214,942.20 and 129,516.70 is: 194,275.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,294.80 : 214,942.20 = 129,516.70 : x
  2. Step 2: Convert to fraction form
    143,294.80/214,942.20 = 129,516.70/x
  3. Step 3: Cross multiply
    143,294.80x = 214,942.20 × 129,516.70
  4. Step 4: Simplify right side
    143,294.80x = 27,838,604,434.74
  5. Step 5: Solve for x
    x = 27,838,604,434.74/143,294.80
  6. Step 6: Final answer
    x = 194,275.05

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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.