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Finding the Fourth Proportional to 81,792.89, 112,872.57 and 45,493.55

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Solution

The fourth proportional to 81,792.89, 112,872.57 and 45,493.55 is: 62,780.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,792.89 : 112,872.57 = 45,493.55 : x
  2. Step 2: Convert to fraction form
    81,792.89/112,872.57 = 45,493.55/x
  3. Step 3: Cross multiply
    81,792.89x = 112,872.57 × 45,493.55
  4. Step 4: Simplify right side
    81,792.89x = 5,134,973,807.11
  5. Step 5: Solve for x
    x = 5,134,973,807.11/81,792.89
  6. Step 6: Final answer
    x = 62,780.20

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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.