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Finding the Fourth Proportional to 139,937.91, 193,114.37 and 79,508.63

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Solution

The fourth proportional to 139,937.91, 193,114.37 and 79,508.63 is: 109,721.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,937.91 : 193,114.37 = 79,508.63 : x
  2. Step 2: Convert to fraction form
    139,937.91/193,114.37 = 79,508.63/x
  3. Step 3: Cross multiply
    139,937.91x = 193,114.37 × 79,508.63
  4. Step 4: Simplify right side
    139,937.91x = 15,354,258,594.47
  5. Step 5: Solve for x
    x = 15,354,258,594.47/139,937.91
  6. Step 6: Final answer
    x = 109,721.94

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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.