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Finding the Fourth Proportional to 81,166.80, 121,728.60 and 25,006.80

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Solution

The fourth proportional to 81,166.80, 121,728.60 and 25,006.80 is: 37,503.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,166.80 : 121,728.60 = 25,006.80 : x
  2. Step 2: Convert to fraction form
    81,166.80/121,728.60 = 25,006.80/x
  3. Step 3: Cross multiply
    81,166.80x = 121,728.60 × 25,006.80
  4. Step 4: Simplify right side
    81,166.80x = 3,044,042,754.48
  5. Step 5: Solve for x
    x = 3,044,042,754.48/81,166.80
  6. Step 6: Final answer
    x = 37,503.55

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1.5x scale

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.