Home / 91,340.70-125,565.86-78,546.78

Finding the Fourth Proportional to 91,340.70, 125,565.86 and 78,546.78

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Solution

The fourth proportional to 91,340.70, 125,565.86 and 78,546.78 is: 107,978.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,340.70 : 125,565.86 = 78,546.78 : x
  2. Step 2: Convert to fraction form
    91,340.70/125,565.86 = 78,546.78/x
  3. Step 3: Cross multiply
    91,340.70x = 125,565.86 × 78,546.78
  4. Step 4: Simplify right side
    91,340.70x = 9,862,793,588.20
  5. Step 5: Solve for x
    x = 9,862,793,588.20/91,340.70
  6. Step 6: Final answer
    x = 107,978.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.