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Finding the Fourth Proportional to 153,591.12, 211,957.20 and 86,523.12

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Solution

The fourth proportional to 153,591.12, 211,957.20 and 86,523.12 is: 119,402.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,591.12 : 211,957.20 = 86,523.12 : x
  2. Step 2: Convert to fraction form
    153,591.12/211,957.20 = 86,523.12/x
  3. Step 3: Cross multiply
    153,591.12x = 211,957.20 × 86,523.12
  4. Step 4: Simplify right side
    153,591.12x = 18,339,198,250.46
  5. Step 5: Solve for x
    x = 18,339,198,250.46/153,591.12
  6. Step 6: Final answer
    x = 119,402.72

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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.