Home / 90,805.12-125,207.68-63,939.04

Finding the Fourth Proportional to 90,805.12, 125,207.68 and 63,939.04

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Solution

The fourth proportional to 90,805.12, 125,207.68 and 63,939.04 is: 88,163.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,805.12 : 125,207.68 = 63,939.04 : x
  2. Step 2: Convert to fraction form
    90,805.12/125,207.68 = 63,939.04/x
  3. Step 3: Cross multiply
    90,805.12x = 125,207.68 × 63,939.04
  4. Step 4: Simplify right side
    90,805.12x = 8,005,658,859.83
  5. Step 5: Solve for x
    x = 8,005,658,859.83/90,805.12
  6. Step 6: Final answer
    x = 88,163.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.