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Finding the Fourth Proportional to 72,514.85, 100,080.90 and 40,256.87

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Solution

The fourth proportional to 72,514.85, 100,080.90 and 40,256.87 is: 55,560.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,514.85 : 100,080.90 = 40,256.87 : x
  2. Step 2: Convert to fraction form
    72,514.85/100,080.90 = 40,256.87/x
  3. Step 3: Cross multiply
    72,514.85x = 100,080.90 × 40,256.87
  4. Step 4: Simplify right side
    72,514.85x = 4,028,943,280.38
  5. Step 5: Solve for x
    x = 4,028,943,280.38/72,514.85
  6. Step 6: Final answer
    x = 55,560.26

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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.