Home / 143,723.74-215,422.13-87,439.78

Finding the Fourth Proportional to 143,723.74, 215,422.13 and 87,439.78

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Solution

The fourth proportional to 143,723.74, 215,422.13 and 87,439.78 is: 131,060.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,723.74 : 215,422.13 = 87,439.78 : x
  2. Step 2: Convert to fraction form
    143,723.74/215,422.13 = 87,439.78/x
  3. Step 3: Cross multiply
    143,723.74x = 215,422.13 × 87,439.78
  4. Step 4: Simplify right side
    143,723.74x = 18,836,462,678.58
  5. Step 5: Solve for x
    x = 18,836,462,678.58/143,723.74
  6. Step 6: Final answer
    x = 131,060.21

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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.