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Finding the Fourth Proportional to 69,792.40, 104,656.20 and 30,329.20

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Solution

The fourth proportional to 69,792.40, 104,656.20 and 30,329.20 is: 45,479.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,792.40 : 104,656.20 = 30,329.20 : x
  2. Step 2: Convert to fraction form
    69,792.40/104,656.20 = 30,329.20/x
  3. Step 3: Cross multiply
    69,792.40x = 104,656.20 × 30,329.20
  4. Step 4: Simplify right side
    69,792.40x = 3,174,138,821.04
  5. Step 5: Solve for x
    x = 3,174,138,821.04/69,792.40
  6. Step 6: Final answer
    x = 45,479.72

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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.