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Finding the Fourth Proportional to 172,671.64, 258,939.36 and 83,898.88

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Solution

The fourth proportional to 172,671.64, 258,939.36 and 83,898.88 is: 125,815.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,671.64 : 258,939.36 = 83,898.88 : x
  2. Step 2: Convert to fraction form
    172,671.64/258,939.36 = 83,898.88/x
  3. Step 3: Cross multiply
    172,671.64x = 258,939.36 × 83,898.88
  4. Step 4: Simplify right side
    172,671.64x = 21,724,722,291.92
  5. Step 5: Solve for x
    x = 21,724,722,291.92/172,671.64
  6. Step 6: Final answer
    x = 125,815.23

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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.