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Finding the Fourth Proportional to 66,082.70, 99,139.44 and 19,339.22

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Solution

The fourth proportional to 66,082.70, 99,139.44 and 19,339.22 is: 29,013.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,082.70 : 99,139.44 = 19,339.22 : x
  2. Step 2: Convert to fraction form
    66,082.70/99,139.44 = 19,339.22/x
  3. Step 3: Cross multiply
    66,082.70x = 99,139.44 × 19,339.22
  4. Step 4: Simplify right side
    66,082.70x = 1,917,279,440.84
  5. Step 5: Solve for x
    x = 1,917,279,440.84/66,082.70
  6. Step 6: Final answer
    x = 29,013.33

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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.