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Finding the Fourth Proportional to 129,765.55, 194,529.40 and 45,479.77

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Solution

The fourth proportional to 129,765.55, 194,529.40 and 45,479.77 is: 68,177.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,765.55 : 194,529.40 = 45,479.77 : x
  2. Step 2: Convert to fraction form
    129,765.55/194,529.40 = 45,479.77/x
  3. Step 3: Cross multiply
    129,765.55x = 194,529.40 × 45,479.77
  4. Step 4: Simplify right side
    129,765.55x = 8,847,152,370.24
  5. Step 5: Solve for x
    x = 8,847,152,370.24/129,765.55
  6. Step 6: Final answer
    x = 68,177.97

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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.