Home / 75,135.92-103,686.20-41,143.78

Finding the Fourth Proportional to 75,135.92, 103,686.20 and 41,143.78

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Solution

The fourth proportional to 75,135.92, 103,686.20 and 41,143.78 is: 56,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,135.92 : 103,686.20 = 41,143.78 : x
  2. Step 2: Convert to fraction form
    75,135.92/103,686.20 = 41,143.78/x
  3. Step 3: Cross multiply
    75,135.92x = 103,686.20 × 41,143.78
  4. Step 4: Simplify right side
    75,135.92x = 4,266,041,942.62
  5. Step 5: Solve for x
    x = 4,266,041,942.62/75,135.92
  6. Step 6: Final answer
    x = 56,777.66

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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.