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Finding the Fourth Proportional to 219,793.80, 329,727.15 and 86,678.40

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Solution

The fourth proportional to 219,793.80, 329,727.15 and 86,678.40 is: 130,031.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,793.80 : 329,727.15 = 86,678.40 : x
  2. Step 2: Convert to fraction form
    219,793.80/329,727.15 = 86,678.40/x
  3. Step 3: Cross multiply
    219,793.80x = 329,727.15 × 86,678.40
  4. Step 4: Simplify right side
    219,793.80x = 28,580,221,798.56
  5. Step 5: Solve for x
    x = 28,580,221,798.56/219,793.80
  6. Step 6: Final answer
    x = 130,031.97

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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.