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Finding the Fourth Proportional to 172,917.20, 258,857.40 and 162,664.40

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Solution

The fourth proportional to 172,917.20, 258,857.40 and 162,664.40 is: 243,508.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,917.20 : 258,857.40 = 162,664.40 : x
  2. Step 2: Convert to fraction form
    172,917.20/258,857.40 = 162,664.40/x
  3. Step 3: Cross multiply
    172,917.20x = 258,857.40 × 162,664.40
  4. Step 4: Simplify right side
    172,917.20x = 42,106,883,656.56
  5. Step 5: Solve for x
    x = 42,106,883,656.56/172,917.20
  6. Step 6: Final answer
    x = 243,508.94

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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.