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Finding the Fourth Proportional to 219,672.80, 329,384.28 and 86,480.92

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Solution

The fourth proportional to 219,672.80, 329,384.28 and 86,480.92 is: 129,672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,672.80 : 329,384.28 = 86,480.92 : x
  2. Step 2: Convert to fraction form
    219,672.80/329,384.28 = 86,480.92/x
  3. Step 3: Cross multiply
    219,672.80x = 329,384.28 × 86,480.92
  4. Step 4: Simplify right side
    219,672.80x = 28,485,455,567.94
  5. Step 5: Solve for x
    x = 28,485,455,567.94/219,672.80
  6. Step 6: Final answer
    x = 129,672.20

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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.