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Finding the Fourth Proportional to 121,617.20, 182,425.80 and 99,747.20

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Solution

The fourth proportional to 121,617.20, 182,425.80 and 99,747.20 is: 149,620.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,617.20 : 182,425.80 = 99,747.20 : x
  2. Step 2: Convert to fraction form
    121,617.20/182,425.80 = 99,747.20/x
  3. Step 3: Cross multiply
    121,617.20x = 182,425.80 × 99,747.20
  4. Step 4: Simplify right side
    121,617.20x = 18,196,462,757.76
  5. Step 5: Solve for x
    x = 18,196,462,757.76/121,617.20
  6. Step 6: Final answer
    x = 149,620.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.