Home / 129,780.16-194,576.74-79,756.86

Finding the Fourth Proportional to 129,780.16, 194,576.74 and 79,756.86

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Solution

The fourth proportional to 129,780.16, 194,576.74 and 79,756.86 is: 119,577.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,780.16 : 194,576.74 = 79,756.86 : x
  2. Step 2: Convert to fraction form
    129,780.16/194,576.74 = 79,756.86/x
  3. Step 3: Cross multiply
    129,780.16x = 194,576.74 × 79,756.86
  4. Step 4: Simplify right side
    129,780.16x = 15,518,829,811.44
  5. Step 5: Solve for x
    x = 15,518,829,811.44/129,780.16
  6. Step 6: Final answer
    x = 119,577.83

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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.