Home / 129,348.85-178,500.75-72,760.63

Finding the Fourth Proportional to 129,348.85, 178,500.75 and 72,760.63

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Solution

The fourth proportional to 129,348.85, 178,500.75 and 72,760.63 is: 100,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,348.85 : 178,500.75 = 72,760.63 : x
  2. Step 2: Convert to fraction form
    129,348.85/178,500.75 = 72,760.63/x
  3. Step 3: Cross multiply
    129,348.85x = 178,500.75 × 72,760.63
  4. Step 4: Simplify right side
    129,348.85x = 12,987,827,025.47
  5. Step 5: Solve for x
    x = 12,987,827,025.47/129,348.85
  6. Step 6: Final answer
    x = 100,409.30

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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.