Home / 129,668.78-178,919.92-72,303.54

Finding the Fourth Proportional to 129,668.78, 178,919.92 and 72,303.54

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Solution

The fourth proportional to 129,668.78, 178,919.92 and 72,303.54 is: 99,766.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,668.78 : 178,919.92 = 72,303.54 : x
  2. Step 2: Convert to fraction form
    129,668.78/178,919.92 = 72,303.54/x
  3. Step 3: Cross multiply
    129,668.78x = 178,919.92 × 72,303.54
  4. Step 4: Simplify right side
    129,668.78x = 12,936,543,011.95
  5. Step 5: Solve for x
    x = 12,936,543,011.95/129,668.78
  6. Step 6: Final answer
    x = 99,766.06

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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.