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Finding the Fourth Proportional to 69,920, 96,491.23 and 39,700.52

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Solution

The fourth proportional to 69,920, 96,491.23 and 39,700.52 is: 54,787.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,920 : 96,491.23 = 39,700.52 : x
  2. Step 2: Convert to fraction form
    69,920/96,491.23 = 39,700.52/x
  3. Step 3: Cross multiply
    69,920x = 96,491.23 × 39,700.52
  4. Step 4: Simplify right side
    69,920x = 3,830,752,006.44
  5. Step 5: Solve for x
    x = 3,830,752,006.44/69,920
  6. Step 6: Final answer
    x = 54,787.64

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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.