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Finding the Fourth Proportional to 219,957.12, 329,853.60 and 86,793.12

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Solution

The fourth proportional to 219,957.12, 329,853.60 and 86,793.12 is: 130,157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,957.12 : 329,853.60 = 86,793.12 : x
  2. Step 2: Convert to fraction form
    219,957.12/329,853.60 = 86,793.12/x
  3. Step 3: Cross multiply
    219,957.12x = 329,853.60 × 86,793.12
  4. Step 4: Simplify right side
    219,957.12x = 28,629,023,087.23
  5. Step 5: Solve for x
    x = 28,629,023,087.23/219,957.12
  6. Step 6: Final answer
    x = 130,157.29

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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.