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Finding the Fourth Proportional to 172,388.40, 258,582.56 and 54,070.08

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Solution

The fourth proportional to 172,388.40, 258,582.56 and 54,070.08 is: 81,105.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,388.40 : 258,582.56 = 54,070.08 : x
  2. Step 2: Convert to fraction form
    172,388.40/258,582.56 = 54,070.08/x
  3. Step 3: Cross multiply
    172,388.40x = 258,582.56 × 54,070.08
  4. Step 4: Simplify right side
    172,388.40x = 13,981,579,705.80
  5. Step 5: Solve for x
    x = 13,981,579,705.80/172,388.40
  6. Step 6: Final answer
    x = 81,105.11

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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.