Home / 90,389.68-135,634.80-40,467.76

Finding the Fourth Proportional to 90,389.68, 135,634.80 and 40,467.76

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Solution

The fourth proportional to 90,389.68, 135,634.80 and 40,467.76 is: 60,724.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,389.68 : 135,634.80 = 40,467.76 : x
  2. Step 2: Convert to fraction form
    90,389.68/135,634.80 = 40,467.76/x
  3. Step 3: Cross multiply
    90,389.68x = 135,634.80 × 40,467.76
  4. Step 4: Simplify right side
    90,389.68x = 5,488,836,534.05
  5. Step 5: Solve for x
    x = 5,488,836,534.05/90,389.68
  6. Step 6: Final answer
    x = 60,724.15

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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.