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Finding the Fourth Proportional to 139,915.53, 193,077.81 and 76,251.96

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Solution

The fourth proportional to 139,915.53, 193,077.81 and 76,251.96 is: 105,224.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,915.53 : 193,077.81 = 76,251.96 : x
  2. Step 2: Convert to fraction form
    139,915.53/193,077.81 = 76,251.96/x
  3. Step 3: Cross multiply
    139,915.53x = 193,077.81 × 76,251.96
  4. Step 4: Simplify right side
    139,915.53x = 14,722,561,445.01
  5. Step 5: Solve for x
    x = 14,722,561,445.01/139,915.53
  6. Step 6: Final answer
    x = 105,224.64

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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.