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Finding the Fourth Proportional to 89,181.60, 133,729.20 and 49,696.80

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Solution

The fourth proportional to 89,181.60, 133,729.20 and 49,696.80 is: 74,521.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,181.60 : 133,729.20 = 49,696.80 : x
  2. Step 2: Convert to fraction form
    89,181.60/133,729.20 = 49,696.80/x
  3. Step 3: Cross multiply
    89,181.60x = 133,729.20 × 49,696.80
  4. Step 4: Simplify right side
    89,181.60x = 6,645,913,306.56
  5. Step 5: Solve for x
    x = 6,645,913,306.56/89,181.60
  6. Step 6: Final answer
    x = 74,521.13

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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.