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Finding the Fourth Proportional to 140,373.30, 193,749.54 and 79,979.54

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Solution

The fourth proportional to 140,373.30, 193,749.54 and 79,979.54 is: 110,391.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,373.30 : 193,749.54 = 79,979.54 : x
  2. Step 2: Convert to fraction form
    140,373.30/193,749.54 = 79,979.54/x
  3. Step 3: Cross multiply
    140,373.30x = 193,749.54 × 79,979.54
  4. Step 4: Simplify right side
    140,373.30x = 15,495,997,815.74
  5. Step 5: Solve for x
    x = 15,495,997,815.74/140,373.30
  6. Step 6: Final answer
    x = 110,391.35

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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.