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Finding the Fourth Proportional to 219,612.80, 329,419.20 and 109,020.80

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Solution

The fourth proportional to 219,612.80, 329,419.20 and 109,020.80 is: 163,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,612.80 : 329,419.20 = 109,020.80 : x
  2. Step 2: Convert to fraction form
    219,612.80/329,419.20 = 109,020.80/x
  3. Step 3: Cross multiply
    219,612.80x = 329,419.20 × 109,020.80
  4. Step 4: Simplify right side
    219,612.80x = 35,913,544,719.36
  5. Step 5: Solve for x
    x = 35,913,544,719.36/219,612.80
  6. Step 6: Final answer
    x = 163,531.20

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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.