Home / 76,925.76-115,379.29-20,761.57

Finding the Fourth Proportional to 76,925.76, 115,379.29 and 20,761.57

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Solution

The fourth proportional to 76,925.76, 115,379.29 and 20,761.57 is: 31,139.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,925.76 : 115,379.29 = 20,761.57 : x
  2. Step 2: Convert to fraction form
    76,925.76/115,379.29 = 20,761.57/x
  3. Step 3: Cross multiply
    76,925.76x = 115,379.29 × 20,761.57
  4. Step 4: Simplify right side
    76,925.76x = 2,395,455,205.89
  5. Step 5: Solve for x
    x = 2,395,455,205.89/76,925.76
  6. Step 6: Final answer
    x = 31,139.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.