Home / 135,681.68-187,262.28-81,974.43

Finding the Fourth Proportional to 135,681.68, 187,262.28 and 81,974.43

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Solution

The fourth proportional to 135,681.68, 187,262.28 and 81,974.43 is: 113,137.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,681.68 : 187,262.28 = 81,974.43 : x
  2. Step 2: Convert to fraction form
    135,681.68/187,262.28 = 81,974.43/x
  3. Step 3: Cross multiply
    135,681.68x = 187,262.28 × 81,974.43
  4. Step 4: Simplify right side
    135,681.68x = 15,350,718,663.50
  5. Step 5: Solve for x
    x = 15,350,718,663.50/135,681.68
  6. Step 6: Final answer
    x = 113,137.74

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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.