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Finding the Fourth Proportional to 219,645.55, 329,343.45 and 86,453.61

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Solution

The fourth proportional to 219,645.55, 329,343.45 and 86,453.61 is: 129,631.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,645.55 : 329,343.45 = 86,453.61 : x
  2. Step 2: Convert to fraction form
    219,645.55/329,343.45 = 86,453.61/x
  3. Step 3: Cross multiply
    219,645.55x = 329,343.45 × 86,453.61
  4. Step 4: Simplify right side
    219,645.55x = 28,472,930,182.35
  5. Step 5: Solve for x
    x = 28,472,930,182.35/219,645.55
  6. Step 6: Final answer
    x = 129,631.26

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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.