Home / 135,431.34-186,836.22-81,686.52

Finding the Fourth Proportional to 135,431.34, 186,836.22 and 81,686.52

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Solution

The fourth proportional to 135,431.34, 186,836.22 and 81,686.52 is: 112,691.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,431.34 : 186,836.22 = 81,686.52 : x
  2. Step 2: Convert to fraction form
    135,431.34/186,836.22 = 81,686.52/x
  3. Step 3: Cross multiply
    135,431.34x = 186,836.22 × 81,686.52
  4. Step 4: Simplify right side
    135,431.34x = 15,262,000,621.75
  5. Step 5: Solve for x
    x = 15,262,000,621.75/135,431.34
  6. Step 6: Final answer
    x = 112,691.79

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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.