Home / 129,658.20-194,228.10-74,189.40

Finding the Fourth Proportional to 129,658.20, 194,228.10 and 74,189.40

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Solution

The fourth proportional to 129,658.20, 194,228.10 and 74,189.40 is: 111,135.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,658.20 : 194,228.10 = 74,189.40 : x
  2. Step 2: Convert to fraction form
    129,658.20/194,228.10 = 74,189.40/x
  3. Step 3: Cross multiply
    129,658.20x = 194,228.10 × 74,189.40
  4. Step 4: Simplify right side
    129,658.20x = 14,409,666,202.14
  5. Step 5: Solve for x
    x = 14,409,666,202.14/129,658.20
  6. Step 6: Final answer
    x = 111,135.79

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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.