Home / 129,825.20-194,737.80-81,152.30

Finding the Fourth Proportional to 129,825.20, 194,737.80 and 81,152.30

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Solution

The fourth proportional to 129,825.20, 194,737.80 and 81,152.30 is: 121,728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,825.20 : 194,737.80 = 81,152.30 : x
  2. Step 2: Convert to fraction form
    129,825.20/194,737.80 = 81,152.30/x
  3. Step 3: Cross multiply
    129,825.20x = 194,737.80 × 81,152.30
  4. Step 4: Simplify right side
    129,825.20x = 15,803,420,366.94
  5. Step 5: Solve for x
    x = 15,803,420,366.94/129,825.20
  6. Step 6: Final answer
    x = 121,728.45

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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.