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Finding the Fourth Proportional to 69,806.21, 104,721.53 and 19,885.10

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Solution

The fourth proportional to 69,806.21, 104,721.53 and 19,885.10 is: 29,831.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,806.21 : 104,721.53 = 19,885.10 : x
  2. Step 2: Convert to fraction form
    69,806.21/104,721.53 = 19,885.10/x
  3. Step 3: Cross multiply
    69,806.21x = 104,721.53 × 19,885.10
  4. Step 4: Simplify right side
    69,806.21x = 2,082,397,473.17
  5. Step 5: Solve for x
    x = 2,082,397,473.17/69,806.21
  6. Step 6: Final answer
    x = 29,831.12

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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.