Home / 142,520.30-213,711.25-53,780.72

Finding the Fourth Proportional to 142,520.30, 213,711.25 and 53,780.72

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Solution

The fourth proportional to 142,520.30, 213,711.25 and 53,780.72 is: 80,644.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,520.30 : 213,711.25 = 53,780.72 : x
  2. Step 2: Convert to fraction form
    142,520.30/213,711.25 = 53,780.72/x
  3. Step 3: Cross multiply
    142,520.30x = 213,711.25 × 53,780.72
  4. Step 4: Simplify right side
    142,520.30x = 11,493,545,221.96
  5. Step 5: Solve for x
    x = 11,493,545,221.96/142,520.30
  6. Step 6: Final answer
    x = 80,644.97

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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.