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Finding the Fourth Proportional to 219,691.71, 329,314.61 and 86,666.22

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Solution

The fourth proportional to 219,691.71, 329,314.61 and 86,666.22 is: 129,911.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,691.71 : 329,314.61 = 86,666.22 : x
  2. Step 2: Convert to fraction form
    219,691.71/329,314.61 = 86,666.22/x
  3. Step 3: Cross multiply
    219,691.71x = 329,314.61 × 86,666.22
  4. Step 4: Simplify right side
    219,691.71x = 28,540,452,656.14
  5. Step 5: Solve for x
    x = 28,540,452,656.14/219,691.71
  6. Step 6: Final answer
    x = 129,911.38

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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.