Home / 91,536.40-137,138.82-76,839.76

Finding the Fourth Proportional to 91,536.40, 137,138.82 and 76,839.76

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Solution

The fourth proportional to 91,536.40, 137,138.82 and 76,839.76 is: 115,120.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,536.40 : 137,138.82 = 76,839.76 : x
  2. Step 2: Convert to fraction form
    91,536.40/137,138.82 = 76,839.76/x
  3. Step 3: Cross multiply
    91,536.40x = 137,138.82 × 76,839.76
  4. Step 4: Simplify right side
    91,536.40x = 10,537,714,015.48
  5. Step 5: Solve for x
    x = 10,537,714,015.48/91,536.40
  6. Step 6: Final answer
    x = 115,120.48

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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.