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Finding the Fourth Proportional to 81,230.73, 121,838.43 and 25,055.76

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Solution

The fourth proportional to 81,230.73, 121,838.43 and 25,055.76 is: 37,581.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,230.73 : 121,838.43 = 25,055.76 : x
  2. Step 2: Convert to fraction form
    81,230.73/121,838.43 = 25,055.76/x
  3. Step 3: Cross multiply
    81,230.73x = 121,838.43 × 25,055.76
  4. Step 4: Simplify right side
    81,230.73x = 3,052,754,460.86
  5. Step 5: Solve for x
    x = 3,052,754,460.86/81,230.73
  6. Step 6: Final answer
    x = 37,581.28

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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.