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Finding the Fourth Proportional to 69,048.80, 103,573.20 and 21,671.20

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Solution

The fourth proportional to 69,048.80, 103,573.20 and 21,671.20 is: 32,506.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,048.80 : 103,573.20 = 21,671.20 : x
  2. Step 2: Convert to fraction form
    69,048.80/103,573.20 = 21,671.20/x
  3. Step 3: Cross multiply
    69,048.80x = 103,573.20 × 21,671.20
  4. Step 4: Simplify right side
    69,048.80x = 2,244,555,531.84
  5. Step 5: Solve for x
    x = 2,244,555,531.84/69,048.80
  6. Step 6: Final answer
    x = 32,506.80

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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.