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Finding the Fourth Proportional to 139,910.60, 193,071 and 76,247.02

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Solution

The fourth proportional to 139,910.60, 193,071 and 76,247.02 is: 105,217.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,910.60 : 193,071 = 76,247.02 : x
  2. Step 2: Convert to fraction form
    139,910.60/193,071 = 76,247.02/x
  3. Step 3: Cross multiply
    139,910.60x = 193,071 × 76,247.02
  4. Step 4: Simplify right side
    139,910.60x = 14,721,088,398.42
  5. Step 5: Solve for x
    x = 14,721,088,398.42/139,910.60
  6. Step 6: Final answer
    x = 105,217.82

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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.