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Finding the Fourth Proportional to 143,624.87, 215,326.29 and 72,510.90

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Solution

The fourth proportional to 143,624.87, 215,326.29 and 72,510.90 is: 108,710.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,624.87 : 215,326.29 = 72,510.90 : x
  2. Step 2: Convert to fraction form
    143,624.87/215,326.29 = 72,510.90/x
  3. Step 3: Cross multiply
    143,624.87x = 215,326.29 × 72,510.90
  4. Step 4: Simplify right side
    143,624.87x = 15,613,503,081.56
  5. Step 5: Solve for x
    x = 15,613,503,081.56/143,624.87
  6. Step 6: Final answer
    x = 108,710.31

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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.