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Finding the Fourth Proportional to 172,664.20, 258,996.30 and 48,005.20

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Solution

The fourth proportional to 172,664.20, 258,996.30 and 48,005.20 is: 72,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,664.20 : 258,996.30 = 48,005.20 : x
  2. Step 2: Convert to fraction form
    172,664.20/258,996.30 = 48,005.20/x
  3. Step 3: Cross multiply
    172,664.20x = 258,996.30 × 48,005.20
  4. Step 4: Simplify right side
    172,664.20x = 12,433,169,180.76
  5. Step 5: Solve for x
    x = 12,433,169,180.76/172,664.20
  6. Step 6: Final answer
    x = 72,007.80

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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.