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Finding the Fourth Proportional to 219,288.80, 329,062.80 and 79,029.20

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Solution

The fourth proportional to 219,288.80, 329,062.80 and 79,029.20 is: 118,590.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,288.80 : 329,062.80 = 79,029.20 : x
  2. Step 2: Convert to fraction form
    219,288.80/329,062.80 = 79,029.20/x
  3. Step 3: Cross multiply
    219,288.80x = 329,062.80 × 79,029.20
  4. Step 4: Simplify right side
    219,288.80x = 26,005,569,833.76
  5. Step 5: Solve for x
    x = 26,005,569,833.76/219,288.80
  6. Step 6: Final answer
    x = 118,590.51

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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.