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Finding the Fourth Proportional to 147,990.78, 204,211.53 and 87,563.97

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Solution

The fourth proportional to 147,990.78, 204,211.53 and 87,563.97 is: 120,828.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,990.78 : 204,211.53 = 87,563.97 : x
  2. Step 2: Convert to fraction form
    147,990.78/204,211.53 = 87,563.97/x
  3. Step 3: Cross multiply
    147,990.78x = 204,211.53 × 87,563.97
  4. Step 4: Simplify right side
    147,990.78x = 17,881,572,286.57
  5. Step 5: Solve for x
    x = 17,881,572,286.57/147,990.78
  6. Step 6: Final answer
    x = 120,828.96

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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.