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Finding the Fourth Proportional to 172,917.20, 259,375.80 and 164,752.40

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Solution

The fourth proportional to 172,917.20, 259,375.80 and 164,752.40 is: 247,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,917.20 : 259,375.80 = 164,752.40 : x
  2. Step 2: Convert to fraction form
    172,917.20/259,375.80 = 164,752.40/x
  3. Step 3: Cross multiply
    172,917.20x = 259,375.80 × 164,752.40
  4. Step 4: Simplify right side
    172,917.20x = 42,732,785,551.92
  5. Step 5: Solve for x
    x = 42,732,785,551.92/172,917.20
  6. Step 6: Final answer
    x = 247,128.60

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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.