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Finding the Fourth Proportional to 172,948.21, 238,658.25 and 100,345.48

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Solution

The fourth proportional to 172,948.21, 238,658.25 and 100,345.48 is: 138,470.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,948.21 : 238,658.25 = 100,345.48 : x
  2. Step 2: Convert to fraction form
    172,948.21/238,658.25 = 100,345.48/x
  3. Step 3: Cross multiply
    172,948.21x = 238,658.25 × 100,345.48
  4. Step 4: Simplify right side
    172,948.21x = 23,948,274,957.19
  5. Step 5: Solve for x
    x = 23,948,274,957.19/172,948.21
  6. Step 6: Final answer
    x = 138,470.79

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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.