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Finding the Fourth Proportional to 172,389.40, 258,584.06 and 54,071.08

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Solution

The fourth proportional to 172,389.40, 258,584.06 and 54,071.08 is: 81,106.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,389.40 : 258,584.06 = 54,071.08 : x
  2. Step 2: Convert to fraction form
    172,389.40/258,584.06 = 54,071.08/x
  3. Step 3: Cross multiply
    172,389.40x = 258,584.06 × 54,071.08
  4. Step 4: Simplify right side
    172,389.40x = 13,981,919,394.98
  5. Step 5: Solve for x
    x = 13,981,919,394.98/172,389.40
  6. Step 6: Final answer
    x = 81,106.61

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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.