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Finding the Fourth Proportional to 81,627.78, 112,637.69 and 45,821.73

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Solution

The fourth proportional to 81,627.78, 112,637.69 and 45,821.73 is: 63,229.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,627.78 : 112,637.69 = 45,821.73 : x
  2. Step 2: Convert to fraction form
    81,627.78/112,637.69 = 45,821.73/x
  3. Step 3: Cross multiply
    81,627.78x = 112,637.69 × 45,821.73
  4. Step 4: Simplify right side
    81,627.78x = 5,161,254,184.12
  5. Step 5: Solve for x
    x = 5,161,254,184.12/81,627.78
  6. Step 6: Final answer
    x = 63,229.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.