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Finding the Fourth Proportional to 220,125.40, 330,168.90 and 72,381.40

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Solution

The fourth proportional to 220,125.40, 330,168.90 and 72,381.40 is: 108,565.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,125.40 : 330,168.90 = 72,381.40 : x
  2. Step 2: Convert to fraction form
    220,125.40/330,168.90 = 72,381.40/x
  3. Step 3: Cross multiply
    220,125.40x = 330,168.90 × 72,381.40
  4. Step 4: Simplify right side
    220,125.40x = 23,898,087,218.46
  5. Step 5: Solve for x
    x = 23,898,087,218.46/220,125.40
  6. Step 6: Final answer
    x = 108,565.79

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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.