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Finding the Fourth Proportional to 80,707.78, 121,081.08 and 25,303.78

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Solution

The fourth proportional to 80,707.78, 121,081.08 and 25,303.78 is: 37,961.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,707.78 : 121,081.08 = 25,303.78 : x
  2. Step 2: Convert to fraction form
    80,707.78/121,081.08 = 25,303.78/x
  3. Step 3: Cross multiply
    80,707.78x = 121,081.08 × 25,303.78
  4. Step 4: Simplify right side
    80,707.78x = 3,063,809,010.48
  5. Step 5: Solve for x
    x = 3,063,809,010.48/80,707.78
  6. Step 6: Final answer
    x = 37,961.76

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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.