Home / 90,121.11-135,098.04-42,758.43

Finding the Fourth Proportional to 90,121.11, 135,098.04 and 42,758.43

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Solution

The fourth proportional to 90,121.11, 135,098.04 and 42,758.43 is: 64,097.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,121.11 : 135,098.04 = 42,758.43 : x
  2. Step 2: Convert to fraction form
    90,121.11/135,098.04 = 42,758.43/x
  3. Step 3: Cross multiply
    90,121.11x = 135,098.04 × 42,758.43
  4. Step 4: Simplify right side
    90,121.11x = 5,776,580,086.48
  5. Step 5: Solve for x
    x = 5,776,580,086.48/90,121.11
  6. Step 6: Final answer
    x = 64,097.97

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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.