Home / 129,375.20-178,525.08-72,785.36

Finding the Fourth Proportional to 129,375.20, 178,525.08 and 72,785.36

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Solution

The fourth proportional to 129,375.20, 178,525.08 and 72,785.36 is: 100,436.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,375.20 : 178,525.08 = 72,785.36 : x
  2. Step 2: Convert to fraction form
    129,375.20/178,525.08 = 72,785.36/x
  3. Step 3: Cross multiply
    129,375.20x = 178,525.08 × 72,785.36
  4. Step 4: Simplify right side
    129,375.20x = 12,994,012,216.83
  5. Step 5: Solve for x
    x = 12,994,012,216.83/129,375.20
  6. Step 6: Final answer
    x = 100,436.65

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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.