Home / 76,781.31-115,171.96-30,001.38

Finding the Fourth Proportional to 76,781.31, 115,171.96 and 30,001.38

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Solution

The fourth proportional to 76,781.31, 115,171.96 and 30,001.38 is: 45,002.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,781.31 : 115,171.96 = 30,001.38 : x
  2. Step 2: Convert to fraction form
    76,781.31/115,171.96 = 30,001.38/x
  3. Step 3: Cross multiply
    76,781.31x = 115,171.96 × 30,001.38
  4. Step 4: Simplify right side
    76,781.31x = 3,455,317,737.30
  5. Step 5: Solve for x
    x = 3,455,317,737.30/76,781.31
  6. Step 6: Final answer
    x = 45,002.07

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1.5x scale

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.