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Finding the Fourth Proportional to 67,900.11, 101,850.18 and 21,156.63

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Solution

The fourth proportional to 67,900.11, 101,850.18 and 21,156.63 is: 31,734.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,900.11 : 101,850.18 = 21,156.63 : x
  2. Step 2: Convert to fraction form
    67,900.11/101,850.18 = 21,156.63/x
  3. Step 3: Cross multiply
    67,900.11x = 101,850.18 × 21,156.63
  4. Step 4: Simplify right side
    67,900.11x = 2,154,806,112.42
  5. Step 5: Solve for x
    x = 2,154,806,112.42/67,900.11
  6. Step 6: Final answer
    x = 31,734.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.