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Finding the Fourth Proportional to 81,151.98, 121,728.57 and 24,992.55

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Solution

The fourth proportional to 81,151.98, 121,728.57 and 24,992.55 is: 37,489.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,151.98 : 121,728.57 = 24,992.55 : x
  2. Step 2: Convert to fraction form
    81,151.98/121,728.57 = 24,992.55/x
  3. Step 3: Cross multiply
    81,151.98x = 121,728.57 × 24,992.55
  4. Step 4: Simplify right side
    81,151.98x = 3,042,307,419.01
  5. Step 5: Solve for x
    x = 3,042,307,419.01/81,151.98
  6. Step 6: Final answer
    x = 37,489.01

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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.