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Finding the Fourth Proportional to 78,829.68, 108,756.52 and 60,685.97

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Solution

The fourth proportional to 78,829.68, 108,756.52 and 60,685.97 is: 83,724.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,829.68 : 108,756.52 = 60,685.97 : x
  2. Step 2: Convert to fraction form
    78,829.68/108,756.52 = 60,685.97/x
  3. Step 3: Cross multiply
    78,829.68x = 108,756.52 × 60,685.97
  4. Step 4: Simplify right side
    78,829.68x = 6,599,994,214.53
  5. Step 5: Solve for x
    x = 6,599,994,214.53/78,829.68
  6. Step 6: Final answer
    x = 83,724.73

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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.