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Finding the Fourth Proportional to 139,764.74, 192,876.53 and 79,335.50

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Solution

The fourth proportional to 139,764.74, 192,876.53 and 79,335.50 is: 109,483.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,764.74 : 192,876.53 = 79,335.50 : x
  2. Step 2: Convert to fraction form
    139,764.74/192,876.53 = 79,335.50/x
  3. Step 3: Cross multiply
    139,764.74x = 192,876.53 × 79,335.50
  4. Step 4: Simplify right side
    139,764.74x = 15,301,954,584.75
  5. Step 5: Solve for x
    x = 15,301,954,584.75/139,764.74
  6. Step 6: Final answer
    x = 109,483.66

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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.