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Finding the Fourth Proportional to 172,481.10, 258,721.71 and 77,600.46

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Solution

The fourth proportional to 172,481.10, 258,721.71 and 77,600.46 is: 116,400.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,481.10 : 258,721.71 = 77,600.46 : x
  2. Step 2: Convert to fraction form
    172,481.10/258,721.71 = 77,600.46/x
  3. Step 3: Cross multiply
    172,481.10x = 258,721.71 × 77,600.46
  4. Step 4: Simplify right side
    172,481.10x = 20,076,923,707.99
  5. Step 5: Solve for x
    x = 20,076,923,707.99/172,481.10
  6. Step 6: Final answer
    x = 116,400.72

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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.