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Finding the Fourth Proportional to 124,170, 171,354.60 and 67,581.78

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Solution

The fourth proportional to 124,170, 171,354.60 and 67,581.78 is: 93,262.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,170 : 171,354.60 = 67,581.78 : x
  2. Step 2: Convert to fraction form
    124,170/171,354.60 = 67,581.78/x
  3. Step 3: Cross multiply
    124,170x = 171,354.60 × 67,581.78
  4. Step 4: Simplify right side
    124,170x = 11,580,448,879.19
  5. Step 5: Solve for x
    x = 11,580,448,879.19/124,170
  6. Step 6: Final answer
    x = 93,262.86

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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.