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Finding the Fourth Proportional to 219,687.20, 329,530.80 and 129,874.40

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Solution

The fourth proportional to 219,687.20, 329,530.80 and 129,874.40 is: 194,811.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,687.20 : 329,530.80 = 129,874.40 : x
  2. Step 2: Convert to fraction form
    219,687.20/329,530.80 = 129,874.40/x
  3. Step 3: Cross multiply
    219,687.20x = 329,530.80 × 129,874.40
  4. Step 4: Simplify right side
    219,687.20x = 42,797,614,931.52
  5. Step 5: Solve for x
    x = 42,797,614,931.52/219,687.20
  6. Step 6: Final answer
    x = 194,811.60

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1.5x scale

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.