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Finding the Fourth Proportional to 140,393.76, 193,742.28 and 79,134.36

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Solution

The fourth proportional to 140,393.76, 193,742.28 and 79,134.36 is: 109,204.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,393.76 : 193,742.28 = 79,134.36 : x
  2. Step 2: Convert to fraction form
    140,393.76/193,742.28 = 79,134.36/x
  3. Step 3: Cross multiply
    140,393.76x = 193,742.28 × 79,134.36
  4. Step 4: Simplify right side
    140,393.76x = 15,331,671,332.74
  5. Step 5: Solve for x
    x = 15,331,671,332.74/140,393.76
  6. Step 6: Final answer
    x = 109,204.79

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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.