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Finding the Fourth Proportional to 80,760, 121,144.86 and 25,356

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Solution

The fourth proportional to 80,760, 121,144.86 and 25,356 is: 38,035.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,760 : 121,144.86 = 25,356 : x
  2. Step 2: Convert to fraction form
    80,760/121,144.86 = 25,356/x
  3. Step 3: Cross multiply
    80,760x = 121,144.86 × 25,356
  4. Step 4: Simplify right side
    80,760x = 3,071,749,070.16
  5. Step 5: Solve for x
    x = 3,071,749,070.16/80,760
  6. Step 6: Final answer
    x = 38,035.53

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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.