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Finding the Fourth Proportional to 139,297.28, 192,083.28 and 98,969.04

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Solution

The fourth proportional to 139,297.28, 192,083.28 and 98,969.04 is: 136,472.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,297.28 : 192,083.28 = 98,969.04 : x
  2. Step 2: Convert to fraction form
    139,297.28/192,083.28 = 98,969.04/x
  3. Step 3: Cross multiply
    139,297.28x = 192,083.28 × 98,969.04
  4. Step 4: Simplify right side
    139,297.28x = 19,010,297,821.65
  5. Step 5: Solve for x
    x = 19,010,297,821.65/139,297.28
  6. Step 6: Final answer
    x = 136,472.86

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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.