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Finding the Fourth Proportional to 81,153.44, 112,482.60 and 76,481.42

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Solution

The fourth proportional to 81,153.44, 112,482.60 and 76,481.42 is: 106,006.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,153.44 : 112,482.60 = 76,481.42 : x
  2. Step 2: Convert to fraction form
    81,153.44/112,482.60 = 76,481.42/x
  3. Step 3: Cross multiply
    81,153.44x = 112,482.60 × 76,481.42
  4. Step 4: Simplify right side
    81,153.44x = 8,602,828,973.29
  5. Step 5: Solve for x
    x = 8,602,828,973.29/81,153.44
  6. Step 6: Final answer
    x = 106,006.95

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.