Home / 129,767.10-179,048.03-78,778.55

Finding the Fourth Proportional to 129,767.10, 179,048.03 and 78,778.55

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Solution

The fourth proportional to 129,767.10, 179,048.03 and 78,778.55 is: 108,695.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,767.10 : 179,048.03 = 78,778.55 : x
  2. Step 2: Convert to fraction form
    129,767.10/179,048.03 = 78,778.55/x
  3. Step 3: Cross multiply
    129,767.10x = 179,048.03 × 78,778.55
  4. Step 4: Simplify right side
    129,767.10x = 14,105,142,894.62
  5. Step 5: Solve for x
    x = 14,105,142,894.62/129,767.10
  6. Step 6: Final answer
    x = 108,695.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.