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Finding the Fourth Proportional to 172,892.88, 238,611.15 and 100,311.75

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Solution

The fourth proportional to 172,892.88, 238,611.15 and 100,311.75 is: 138,441.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,892.88 : 238,611.15 = 100,311.75 : x
  2. Step 2: Convert to fraction form
    172,892.88/238,611.15 = 100,311.75/x
  3. Step 3: Cross multiply
    172,892.88x = 238,611.15 × 100,311.75
  4. Step 4: Simplify right side
    172,892.88x = 23,935,502,026.01
  5. Step 5: Solve for x
    x = 23,935,502,026.01/172,892.88
  6. Step 6: Final answer
    x = 138,441.22

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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.