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Finding the Fourth Proportional to 143,920.40, 215,896.80 and 44,079.80

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Solution

The fourth proportional to 143,920.40, 215,896.80 and 44,079.80 is: 66,124.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,920.40 : 215,896.80 = 44,079.80 : x
  2. Step 2: Convert to fraction form
    143,920.40/215,896.80 = 44,079.80/x
  3. Step 3: Cross multiply
    143,920.40x = 215,896.80 × 44,079.80
  4. Step 4: Simplify right side
    143,920.40x = 9,516,687,764.64
  5. Step 5: Solve for x
    x = 9,516,687,764.64/143,920.40
  6. Step 6: Final answer
    x = 66,124.66

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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.