Home / 91,575.17-126,249.66-78,289.14

Finding the Fourth Proportional to 91,575.17, 126,249.66 and 78,289.14

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Solution

The fourth proportional to 91,575.17, 126,249.66 and 78,289.14 is: 107,932.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,575.17 : 126,249.66 = 78,289.14 : x
  2. Step 2: Convert to fraction form
    91,575.17/126,249.66 = 78,289.14/x
  3. Step 3: Cross multiply
    91,575.17x = 126,249.66 × 78,289.14
  4. Step 4: Simplify right side
    91,575.17x = 9,883,977,306.69
  5. Step 5: Solve for x
    x = 9,883,977,306.69/91,575.17
  6. Step 6: Final answer
    x = 107,932.95

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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.