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Finding the Fourth Proportional to 132,469.20, 182,743.20 and 78,716.16

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Solution

The fourth proportional to 132,469.20, 182,743.20 and 78,716.16 is: 108,590.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,469.20 : 182,743.20 = 78,716.16 : x
  2. Step 2: Convert to fraction form
    132,469.20/182,743.20 = 78,716.16/x
  3. Step 3: Cross multiply
    132,469.20x = 182,743.20 × 78,716.16
  4. Step 4: Simplify right side
    132,469.20x = 14,384,842,970.11
  5. Step 5: Solve for x
    x = 14,384,842,970.11/132,469.20
  6. Step 6: Final answer
    x = 108,590.09

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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.