Home / 129,310.88-178,449.03-72,722.25

Finding the Fourth Proportional to 129,310.88, 178,449.03 and 72,722.25

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Solution

The fourth proportional to 129,310.88, 178,449.03 and 72,722.25 is: 100,356.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,310.88 : 178,449.03 = 72,722.25 : x
  2. Step 2: Convert to fraction form
    129,310.88/178,449.03 = 72,722.25/x
  3. Step 3: Cross multiply
    129,310.88x = 178,449.03 × 72,722.25
  4. Step 4: Simplify right side
    129,310.88x = 12,977,214,971.92
  5. Step 5: Solve for x
    x = 12,977,214,971.92/129,310.88
  6. Step 6: Final answer
    x = 100,356.72

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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.