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Finding the Fourth Proportional to 172,808.90, 238,394.79 and 101,144.54

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Solution

The fourth proportional to 172,808.90, 238,394.79 and 101,144.54 is: 139,531.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,808.90 : 238,394.79 = 101,144.54 : x
  2. Step 2: Convert to fraction form
    172,808.90/238,394.79 = 101,144.54/x
  3. Step 3: Cross multiply
    172,808.90x = 238,394.79 × 101,144.54
  4. Step 4: Simplify right side
    172,808.90x = 24,112,331,372.95
  5. Step 5: Solve for x
    x = 24,112,331,372.95/172,808.90
  6. Step 6: Final answer
    x = 139,531.77

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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.