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Finding the Fourth Proportional to 68,287.38, 102,430.99 and 21,540.25

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Solution

The fourth proportional to 68,287.38, 102,430.99 and 21,540.25 is: 32,310.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,287.38 : 102,430.99 = 21,540.25 : x
  2. Step 2: Convert to fraction form
    68,287.38/102,430.99 = 21,540.25/x
  3. Step 3: Cross multiply
    68,287.38x = 102,430.99 × 21,540.25
  4. Step 4: Simplify right side
    68,287.38x = 2,206,389,132.35
  5. Step 5: Solve for x
    x = 2,206,389,132.35/68,287.38
  6. Step 6: Final answer
    x = 32,310.35

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1.5x scale

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.