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Finding the Fourth Proportional to 172,687.76, 238,217.88 and 118,879.68

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Solution

The fourth proportional to 172,687.76, 238,217.88 and 118,879.68 is: 163,991.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,687.76 : 238,217.88 = 118,879.68 : x
  2. Step 2: Convert to fraction form
    172,687.76/238,217.88 = 118,879.68/x
  3. Step 3: Cross multiply
    172,687.76x = 238,217.88 × 118,879.68
  4. Step 4: Simplify right side
    172,687.76x = 28,319,265,344.68
  5. Step 5: Solve for x
    x = 28,319,265,344.68/172,687.76
  6. Step 6: Final answer
    x = 163,991.16

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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.