Home / 91,425.12-126,170.12-51,138.76

Finding the Fourth Proportional to 91,425.12, 126,170.12 and 51,138.76

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Solution

The fourth proportional to 91,425.12, 126,170.12 and 51,138.76 is: 70,573.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,425.12 : 126,170.12 = 51,138.76 : x
  2. Step 2: Convert to fraction form
    91,425.12/126,170.12 = 51,138.76/x
  3. Step 3: Cross multiply
    91,425.12x = 126,170.12 × 51,138.76
  4. Step 4: Simplify right side
    91,425.12x = 6,452,183,230.16
  5. Step 5: Solve for x
    x = 6,452,183,230.16/91,425.12
  6. Step 6: Final answer
    x = 70,573.42

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Half scale
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Double scale
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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.