Home / 90,981.28-125,581.20-57,469.60

Finding the Fourth Proportional to 90,981.28, 125,581.20 and 57,469.60

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Solution

The fourth proportional to 90,981.28, 125,581.20 and 57,469.60 is: 79,325.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,981.28 : 125,581.20 = 57,469.60 : x
  2. Step 2: Convert to fraction form
    90,981.28/125,581.20 = 57,469.60/x
  3. Step 3: Cross multiply
    90,981.28x = 125,581.20 × 57,469.60
  4. Step 4: Simplify right side
    90,981.28x = 7,217,101,331.52
  5. Step 5: Solve for x
    x = 7,217,101,331.52/90,981.28
  6. Step 6: Final answer
    x = 79,325.12

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1.5x scale

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.