Home / 141,731.92-212,065.56-86,765.20

Finding the Fourth Proportional to 141,731.92, 212,065.56 and 86,765.20

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Solution

The fourth proportional to 141,731.92, 212,065.56 and 86,765.20 is: 129,821.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,731.92 : 212,065.56 = 86,765.20 : x
  2. Step 2: Convert to fraction form
    141,731.92/212,065.56 = 86,765.20/x
  3. Step 3: Cross multiply
    141,731.92x = 212,065.56 × 86,765.20
  4. Step 4: Simplify right side
    141,731.92x = 18,399,910,726.51
  5. Step 5: Solve for x
    x = 18,399,910,726.51/141,731.92
  6. Step 6: Final answer
    x = 129,821.93

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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.