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Finding the Fourth Proportional to 172,939.78, 238,660.50 and 97,488.28

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Solution

The fourth proportional to 172,939.78, 238,660.50 and 97,488.28 is: 134,535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,939.78 : 238,660.50 = 97,488.28 : x
  2. Step 2: Convert to fraction form
    172,939.78/238,660.50 = 97,488.28/x
  3. Step 3: Cross multiply
    172,939.78x = 238,660.50 × 97,488.28
  4. Step 4: Simplify right side
    172,939.78x = 23,266,601,648.94
  5. Step 5: Solve for x
    x = 23,266,601,648.94/172,939.78
  6. Step 6: Final answer
    x = 134,535.86

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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.