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Finding the Fourth Proportional to 172,387.91, 258,581.87 and 54,068.51

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Solution

The fourth proportional to 172,387.91, 258,581.87 and 54,068.51 is: 81,102.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,387.91 : 258,581.87 = 54,068.51 : x
  2. Step 2: Convert to fraction form
    172,387.91/258,581.87 = 54,068.51/x
  3. Step 3: Cross multiply
    172,387.91x = 258,581.87 × 54,068.51
  4. Step 4: Simplify right side
    172,387.91x = 13,981,136,423.91
  5. Step 5: Solve for x
    x = 13,981,136,423.91/172,387.91
  6. Step 6: Final answer
    x = 81,102.77

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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.