Home / 85,305.30-127,981.20-26,139.66

Finding the Fourth Proportional to 85,305.30, 127,981.20 and 26,139.66

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Solution

The fourth proportional to 85,305.30, 127,981.20 and 26,139.66 is: 39,216.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,305.30 : 127,981.20 = 26,139.66 : x
  2. Step 2: Convert to fraction form
    85,305.30/127,981.20 = 26,139.66/x
  3. Step 3: Cross multiply
    85,305.30x = 127,981.20 × 26,139.66
  4. Step 4: Simplify right side
    85,305.30x = 3,345,385,054.39
  5. Step 5: Solve for x
    x = 3,345,385,054.39/85,305.30
  6. Step 6: Final answer
    x = 39,216.61

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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.