Home / 91,789.20-126,748.80-87,065.28

Finding the Fourth Proportional to 91,789.20, 126,748.80 and 87,065.28

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Solution

The fourth proportional to 91,789.20, 126,748.80 and 87,065.28 is: 120,225.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,789.20 : 126,748.80 = 87,065.28 : x
  2. Step 2: Convert to fraction form
    91,789.20/126,748.80 = 87,065.28/x
  3. Step 3: Cross multiply
    91,789.20x = 126,748.80 × 87,065.28
  4. Step 4: Simplify right side
    91,789.20x = 11,035,419,761.66
  5. Step 5: Solve for x
    x = 11,035,419,761.66/91,789.20
  6. Step 6: Final answer
    x = 120,225.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.