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Finding the Fourth Proportional to 80,765, 121,152.36 and 25,361

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Solution

The fourth proportional to 80,765, 121,152.36 and 25,361 is: 38,043.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,765 : 121,152.36 = 25,361 : x
  2. Step 2: Convert to fraction form
    80,765/121,152.36 = 25,361/x
  3. Step 3: Cross multiply
    80,765x = 121,152.36 × 25,361
  4. Step 4: Simplify right side
    80,765x = 3,072,545,001.96
  5. Step 5: Solve for x
    x = 3,072,545,001.96/80,765
  6. Step 6: Final answer
    x = 38,043.03

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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.