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Finding the Fourth Proportional to 143,723.60, 215,682.60 and 80,543.60

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Solution

The fourth proportional to 143,723.60, 215,682.60 and 80,543.60 is: 120,869.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,723.60 : 215,682.60 = 80,543.60 : x
  2. Step 2: Convert to fraction form
    143,723.60/215,682.60 = 80,543.60/x
  3. Step 3: Cross multiply
    143,723.60x = 215,682.60 × 80,543.60
  4. Step 4: Simplify right side
    143,723.60x = 17,371,853,061.36
  5. Step 5: Solve for x
    x = 17,371,853,061.36/143,723.60
  6. Step 6: Final answer
    x = 120,869.87

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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.