Home / 143,724.74-215,423.62-87,440.78

Finding the Fourth Proportional to 143,724.74, 215,423.62 and 87,440.78

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Solution

The fourth proportional to 143,724.74, 215,423.62 and 87,440.78 is: 131,061.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,724.74 : 215,423.62 = 87,440.78 : x
  2. Step 2: Convert to fraction form
    143,724.74/215,423.62 = 87,440.78/x
  3. Step 3: Cross multiply
    143,724.74x = 215,423.62 × 87,440.78
  4. Step 4: Simplify right side
    143,724.74x = 18,836,809,363.22
  5. Step 5: Solve for x
    x = 18,836,809,363.22/143,724.74
  6. Step 6: Final answer
    x = 131,061.70

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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.