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Finding the Fourth Proportional to 219,432.80, 329,120.02 and 86,277.30

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Solution

The fourth proportional to 219,432.80, 329,120.02 and 86,277.30 is: 129,404.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,432.80 : 329,120.02 = 86,277.30 : x
  2. Step 2: Convert to fraction form
    219,432.80/329,120.02 = 86,277.30/x
  3. Step 3: Cross multiply
    219,432.80x = 329,120.02 × 86,277.30
  4. Step 4: Simplify right side
    219,432.80x = 28,395,586,701.55
  5. Step 5: Solve for x
    x = 28,395,586,701.55/219,432.80
  6. Step 6: Final answer
    x = 129,404.48

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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.