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Finding the Fourth Proportional to 142,793.52, 197,062.94 and 79,129.95

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Solution

The fourth proportional to 142,793.52, 197,062.94 and 79,129.95 is: 109,203.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,793.52 : 197,062.94 = 79,129.95 : x
  2. Step 2: Convert to fraction form
    142,793.52/197,062.94 = 79,129.95/x
  3. Step 3: Cross multiply
    142,793.52x = 197,062.94 × 79,129.95
  4. Step 4: Simplify right side
    142,793.52x = 15,593,580,047.89
  5. Step 5: Solve for x
    x = 15,593,580,047.89/142,793.52
  6. Step 6: Final answer
    x = 109,203.70

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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.