Home / 153,972.20-231,060.70-87,412.20

Finding the Fourth Proportional to 153,972.20, 231,060.70 and 87,412.20

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Solution

The fourth proportional to 153,972.20, 231,060.70 and 87,412.20 is: 131,176.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,972.20 : 231,060.70 = 87,412.20 : x
  2. Step 2: Convert to fraction form
    153,972.20/231,060.70 = 87,412.20/x
  3. Step 3: Cross multiply
    153,972.20x = 231,060.70 × 87,412.20
  4. Step 4: Simplify right side
    153,972.20x = 20,197,524,120.54
  5. Step 5: Solve for x
    x = 20,197,524,120.54/153,972.20
  6. Step 6: Final answer
    x = 131,176.43

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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.