Home / 90,813.08-136,218.25-40,857.90

Finding the Fourth Proportional to 90,813.08, 136,218.25 and 40,857.90

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Solution

The fourth proportional to 90,813.08, 136,218.25 and 40,857.90 is: 61,286.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,813.08 : 136,218.25 = 40,857.90 : x
  2. Step 2: Convert to fraction form
    90,813.08/136,218.25 = 40,857.90/x
  3. Step 3: Cross multiply
    90,813.08x = 136,218.25 × 40,857.90
  4. Step 4: Simplify right side
    90,813.08x = 5,565,591,279.12
  5. Step 5: Solve for x
    x = 5,565,591,279.12/90,813.08
  6. Step 6: Final answer
    x = 61,286.23

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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.