Home / 219,685.32-329,301.72-86,511.60

Finding the Fourth Proportional to 219,685.32, 329,301.72 and 86,511.60

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Solution

The fourth proportional to 219,685.32, 329,301.72 and 86,511.60 is: 129,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,685.32 : 329,301.72 = 86,511.60 : x
  2. Step 2: Convert to fraction form
    219,685.32/329,301.72 = 86,511.60/x
  3. Step 3: Cross multiply
    219,685.32x = 329,301.72 × 86,511.60
  4. Step 4: Simplify right side
    219,685.32x = 28,488,418,679.95
  5. Step 5: Solve for x
    x = 28,488,418,679.95/219,685.32
  6. Step 6: Final answer
    x = 129,678.30

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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.