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Finding the Fourth Proportional to 258,179.74, 387,269.91 and 80,687.68

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Solution

The fourth proportional to 258,179.74, 387,269.91 and 80,687.68 is: 121,031.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,179.74 : 387,269.91 = 80,687.68 : x
  2. Step 2: Convert to fraction form
    258,179.74/387,269.91 = 80,687.68/x
  3. Step 3: Cross multiply
    258,179.74x = 387,269.91 × 80,687.68
  4. Step 4: Simplify right side
    258,179.74x = 31,247,909,603.53
  5. Step 5: Solve for x
    x = 31,247,909,603.53/258,179.74
  6. Step 6: Final answer
    x = 121,031.61

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1.5x scale

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.