Home / 129,406.61-193,861.15-79,340.72

Finding the Fourth Proportional to 129,406.61, 193,861.15 and 79,340.72

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Solution

The fourth proportional to 129,406.61, 193,861.15 and 79,340.72 is: 118,858.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,406.61 : 193,861.15 = 79,340.72 : x
  2. Step 2: Convert to fraction form
    129,406.61/193,861.15 = 79,340.72/x
  3. Step 3: Cross multiply
    129,406.61x = 193,861.15 × 79,340.72
  4. Step 4: Simplify right side
    129,406.61x = 15,381,082,053.37
  5. Step 5: Solve for x
    x = 15,381,082,053.37/129,406.61
  6. Step 6: Final answer
    x = 118,858.55

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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.