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Finding the Fourth Proportional to 172,393.70, 238,020.50 and 107,889.05

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Solution

The fourth proportional to 172,393.70, 238,020.50 and 107,889.05 is: 148,960.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,393.70 : 238,020.50 = 107,889.05 : x
  2. Step 2: Convert to fraction form
    172,393.70/238,020.50 = 107,889.05/x
  3. Step 3: Cross multiply
    172,393.70x = 238,020.50 × 107,889.05
  4. Step 4: Simplify right side
    172,393.70x = 25,679,806,490.30
  5. Step 5: Solve for x
    x = 25,679,806,490.30/172,393.70
  6. Step 6: Final answer
    x = 148,960.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.