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Finding the Fourth Proportional to 172,203.64, 258,331.38 and 61,387

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Solution

The fourth proportional to 172,203.64, 258,331.38 and 61,387 is: 92,089.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,203.64 : 258,331.38 = 61,387 : x
  2. Step 2: Convert to fraction form
    172,203.64/258,331.38 = 61,387/x
  3. Step 3: Cross multiply
    172,203.64x = 258,331.38 × 61,387
  4. Step 4: Simplify right side
    172,203.64x = 15,858,188,424.06
  5. Step 5: Solve for x
    x = 15,858,188,424.06/172,203.64
  6. Step 6: Final answer
    x = 92,089.74

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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.