Home / 78,121.85-107,778.42-57,752.82

Finding the Fourth Proportional to 78,121.85, 107,778.42 and 57,752.82

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Solution

The fourth proportional to 78,121.85, 107,778.42 and 57,752.82 is: 79,676.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,121.85 : 107,778.42 = 57,752.82 : x
  2. Step 2: Convert to fraction form
    78,121.85/107,778.42 = 57,752.82/x
  3. Step 3: Cross multiply
    78,121.85x = 107,778.42 × 57,752.82
  4. Step 4: Simplify right side
    78,121.85x = 6,224,508,310.89
  5. Step 5: Solve for x
    x = 6,224,508,310.89/78,121.85
  6. Step 6: Final answer
    x = 79,676.92

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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.