Home / 129,329.10-194,139.45-76,768.20

Finding the Fourth Proportional to 129,329.10, 194,139.45 and 76,768.20

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Solution

The fourth proportional to 129,329.10, 194,139.45 and 76,768.20 is: 115,238.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,329.10 : 194,139.45 = 76,768.20 : x
  2. Step 2: Convert to fraction form
    129,329.10/194,139.45 = 76,768.20/x
  3. Step 3: Cross multiply
    129,329.10x = 194,139.45 × 76,768.20
  4. Step 4: Simplify right side
    129,329.10x = 14,903,736,125.49
  5. Step 5: Solve for x
    x = 14,903,736,125.49/129,329.10
  6. Step 6: Final answer
    x = 115,238.85

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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.