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Finding the Fourth Proportional to 258,106.60, 387,162.78 and 80,600.68

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Solution

The fourth proportional to 258,106.60, 387,162.78 and 80,600.68 is: 120,901.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,106.60 : 387,162.78 = 80,600.68 : x
  2. Step 2: Convert to fraction form
    258,106.60/387,162.78 = 80,600.68/x
  3. Step 3: Cross multiply
    258,106.60x = 387,162.78 × 80,600.68
  4. Step 4: Simplify right side
    258,106.60x = 31,205,583,338.69
  5. Step 5: Solve for x
    x = 31,205,583,338.69/258,106.60
  6. Step 6: Final answer
    x = 120,901.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.