Home / 75,128.40-103,680.12-41,134.86

Finding the Fourth Proportional to 75,128.40, 103,680.12 and 41,134.86

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Solution

The fourth proportional to 75,128.40, 103,680.12 and 41,134.86 is: 56,767.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,128.40 : 103,680.12 = 41,134.86 : x
  2. Step 2: Convert to fraction form
    75,128.40/103,680.12 = 41,134.86/x
  3. Step 3: Cross multiply
    75,128.40x = 103,680.12 × 41,134.86
  4. Step 4: Simplify right side
    75,128.40x = 4,264,867,220.98
  5. Step 5: Solve for x
    x = 4,264,867,220.98/75,128.40
  6. Step 6: Final answer
    x = 56,767.71

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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.