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Finding the Fourth Proportional to 67,620.30, 93,321.84 and 39,324

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Solution

The fourth proportional to 67,620.30, 93,321.84 and 39,324 is: 54,270.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,620.30 : 93,321.84 = 39,324 : x
  2. Step 2: Convert to fraction form
    67,620.30/93,321.84 = 39,324/x
  3. Step 3: Cross multiply
    67,620.30x = 93,321.84 × 39,324
  4. Step 4: Simplify right side
    67,620.30x = 3,669,788,036.16
  5. Step 5: Solve for x
    x = 3,669,788,036.16/67,620.30
  6. Step 6: Final answer
    x = 54,270.51

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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.