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Finding the Fourth Proportional to 143,765.74, 215,650.85 and 42,574.03

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Solution

The fourth proportional to 143,765.74, 215,650.85 and 42,574.03 is: 63,861.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,765.74 : 215,650.85 = 42,574.03 : x
  2. Step 2: Convert to fraction form
    143,765.74/215,650.85 = 42,574.03/x
  3. Step 3: Cross multiply
    143,765.74x = 215,650.85 × 42,574.03
  4. Step 4: Simplify right side
    143,765.74x = 9,181,125,757.43
  5. Step 5: Solve for x
    x = 9,181,125,757.43/143,765.74
  6. Step 6: Final answer
    x = 63,861.71

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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.