Home / 90,728.64-125,170.56-66,911.76

Finding the Fourth Proportional to 90,728.64, 125,170.56 and 66,911.76

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Solution

The fourth proportional to 90,728.64, 125,170.56 and 66,911.76 is: 92,312.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,728.64 : 125,170.56 = 66,911.76 : x
  2. Step 2: Convert to fraction form
    90,728.64/125,170.56 = 66,911.76/x
  3. Step 3: Cross multiply
    90,728.64x = 125,170.56 × 66,911.76
  4. Step 4: Simplify right side
    90,728.64x = 8,375,382,469.79
  5. Step 5: Solve for x
    x = 8,375,382,469.79/90,728.64
  6. Step 6: Final answer
    x = 92,312.44

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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.