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Finding the Fourth Proportional to 91,469.80, 126,234.18 and 51,188.20

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Solution

The fourth proportional to 91,469.80, 126,234.18 and 51,188.20 is: 70,642.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,469.80 : 126,234.18 = 51,188.20 : x
  2. Step 2: Convert to fraction form
    91,469.80/126,234.18 = 51,188.20/x
  3. Step 3: Cross multiply
    91,469.80x = 126,234.18 × 51,188.20
  4. Step 4: Simplify right side
    91,469.80x = 6,461,700,452.68
  5. Step 5: Solve for x
    x = 6,461,700,452.68/91,469.80
  6. Step 6: Final answer
    x = 70,642.99

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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.