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Finding the Fourth Proportional to 139,233.96, 208,587.90 and 107,915.88

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Solution

The fourth proportional to 139,233.96, 208,587.90 and 107,915.88 is: 161,669.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,233.96 : 208,587.90 = 107,915.88 : x
  2. Step 2: Convert to fraction form
    139,233.96/208,587.90 = 107,915.88/x
  3. Step 3: Cross multiply
    139,233.96x = 208,587.90 × 107,915.88
  4. Step 4: Simplify right side
    139,233.96x = 22,509,946,785.85
  5. Step 5: Solve for x
    x = 22,509,946,785.85/139,233.96
  6. Step 6: Final answer
    x = 161,669.95

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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.