Home / 65,490.18-90,378.27-38,630.22

Finding the Fourth Proportional to 65,490.18, 90,378.27 and 38,630.22

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Solution

The fourth proportional to 65,490.18, 90,378.27 and 38,630.22 is: 53,310.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,490.18 : 90,378.27 = 38,630.22 : x
  2. Step 2: Convert to fraction form
    65,490.18/90,378.27 = 38,630.22/x
  3. Step 3: Cross multiply
    65,490.18x = 90,378.27 × 38,630.22
  4. Step 4: Simplify right side
    65,490.18x = 3,491,332,453.32
  5. Step 5: Solve for x
    x = 3,491,332,453.32/65,490.18
  6. Step 6: Final answer
    x = 53,310.78

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Double scale
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Similar ratio
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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.