Home / 90,921.92-125,487.20-56,943.28

Finding the Fourth Proportional to 90,921.92, 125,487.20 and 56,943.28

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Solution

The fourth proportional to 90,921.92, 125,487.20 and 56,943.28 is: 78,591.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,921.92 : 125,487.20 = 56,943.28 : x
  2. Step 2: Convert to fraction form
    90,921.92/125,487.20 = 56,943.28/x
  3. Step 3: Cross multiply
    90,921.92x = 125,487.20 × 56,943.28
  4. Step 4: Simplify right side
    90,921.92x = 7,145,652,766.02
  5. Step 5: Solve for x
    x = 7,145,652,766.02/90,921.92
  6. Step 6: Final answer
    x = 78,591.09

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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.