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Finding the Fourth Proportional to 101,886.40, 152,630.79 and 66,719.44

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Solution

The fourth proportional to 101,886.40, 152,630.79 and 66,719.44 is: 99,948.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,886.40 : 152,630.79 = 66,719.44 : x
  2. Step 2: Convert to fraction form
    101,886.40/152,630.79 = 66,719.44/x
  3. Step 3: Cross multiply
    101,886.40x = 152,630.79 × 66,719.44
  4. Step 4: Simplify right side
    101,886.40x = 10,183,440,120.38
  5. Step 5: Solve for x
    x = 10,183,440,120.38/101,886.40
  6. Step 6: Final answer
    x = 99,948.97

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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.