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Finding the Fourth Proportional to 111,672.56, 154,108.08 and 61,371.56

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Solution

The fourth proportional to 111,672.56, 154,108.08 and 61,371.56 is: 84,692.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,672.56 : 154,108.08 = 61,371.56 : x
  2. Step 2: Convert to fraction form
    111,672.56/154,108.08 = 61,371.56/x
  3. Step 3: Cross multiply
    111,672.56x = 154,108.08 × 61,371.56
  4. Step 4: Simplify right side
    111,672.56x = 9,457,853,278.20
  5. Step 5: Solve for x
    x = 9,457,853,278.20/111,672.56
  6. Step 6: Final answer
    x = 84,692.72

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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.