Home / 129,985.20-194,795.55-103,376.70

Finding the Fourth Proportional to 129,985.20, 194,795.55 and 103,376.70

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Solution

The fourth proportional to 129,985.20, 194,795.55 and 103,376.70 is: 154,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,985.20 : 194,795.55 = 103,376.70 : x
  2. Step 2: Convert to fraction form
    129,985.20/194,795.55 = 103,376.70/x
  3. Step 3: Cross multiply
    129,985.20x = 194,795.55 × 103,376.70
  4. Step 4: Simplify right side
    129,985.20x = 20,137,321,133.69
  5. Step 5: Solve for x
    x = 20,137,321,133.69/129,985.20
  6. Step 6: Final answer
    x = 154,920.11

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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.