Home / 90,748.32-135,983.88-38,129.04

Finding the Fourth Proportional to 90,748.32, 135,983.88 and 38,129.04

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Solution

The fourth proportional to 90,748.32, 135,983.88 and 38,129.04 is: 57,135.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,748.32 : 135,983.88 = 38,129.04 : x
  2. Step 2: Convert to fraction form
    90,748.32/135,983.88 = 38,129.04/x
  3. Step 3: Cross multiply
    90,748.32x = 135,983.88 × 38,129.04
  4. Step 4: Simplify right side
    90,748.32x = 5,184,934,799.88
  5. Step 5: Solve for x
    x = 5,184,934,799.88/90,748.32
  6. Step 6: Final answer
    x = 57,135.33

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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.