Home / 90,909.11-136,382.16-38,318.51

Finding the Fourth Proportional to 90,909.11, 136,382.16 and 38,318.51

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Solution

The fourth proportional to 90,909.11, 136,382.16 and 38,318.51 is: 57,485.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,909.11 : 136,382.16 = 38,318.51 : x
  2. Step 2: Convert to fraction form
    90,909.11/136,382.16 = 38,318.51/x
  3. Step 3: Cross multiply
    90,909.11x = 136,382.16 × 38,318.51
  4. Step 4: Simplify right side
    90,909.11x = 5,225,961,161.78
  5. Step 5: Solve for x
    x = 5,225,961,161.78/90,909.11
  6. Step 6: Final answer
    x = 57,485.56

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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.