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Finding the Fourth Proportional to 140,391.16, 193,749.16 and 79,152.48

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Solution

The fourth proportional to 140,391.16, 193,749.16 and 79,152.48 is: 109,235.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,391.16 : 193,749.16 = 79,152.48 : x
  2. Step 2: Convert to fraction form
    140,391.16/193,749.16 = 79,152.48/x
  3. Step 3: Cross multiply
    140,391.16x = 193,749.16 × 79,152.48
  4. Step 4: Simplify right side
    140,391.16x = 15,335,726,511.92
  5. Step 5: Solve for x
    x = 15,335,726,511.92/140,391.16
  6. Step 6: Final answer
    x = 109,235.70

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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.