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Finding the Fourth Proportional to 172,285.32, 258,164.18 and 115,916.61

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Solution

The fourth proportional to 172,285.32, 258,164.18 and 115,916.61 is: 173,697.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,285.32 : 258,164.18 = 115,916.61 : x
  2. Step 2: Convert to fraction form
    172,285.32/258,164.18 = 115,916.61/x
  3. Step 3: Cross multiply
    172,285.32x = 258,164.18 × 115,916.61
  4. Step 4: Simplify right side
    172,285.32x = 29,925,514,698.63
  5. Step 5: Solve for x
    x = 29,925,514,698.63/172,285.32
  6. Step 6: Final answer
    x = 173,697.42

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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.