Home / 219,628.20-329,442.30-129,815.40

Finding the Fourth Proportional to 219,628.20, 329,442.30 and 129,815.40

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Solution

The fourth proportional to 219,628.20, 329,442.30 and 129,815.40 is: 194,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,628.20 : 329,442.30 = 129,815.40 : x
  2. Step 2: Convert to fraction form
    219,628.20/329,442.30 = 129,815.40/x
  3. Step 3: Cross multiply
    219,628.20x = 329,442.30 × 129,815.40
  4. Step 4: Simplify right side
    219,628.20x = 42,766,683,951.42
  5. Step 5: Solve for x
    x = 42,766,683,951.42/219,628.20
  6. Step 6: Final answer
    x = 194,723.10

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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.