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Finding the Fourth Proportional to 68,640.01, 102,935.88 and 20,594.29

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Solution

The fourth proportional to 68,640.01, 102,935.88 and 20,594.29 is: 30,884.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,640.01 : 102,935.88 = 20,594.29 : x
  2. Step 2: Convert to fraction form
    68,640.01/102,935.88 = 20,594.29/x
  3. Step 3: Cross multiply
    68,640.01x = 102,935.88 × 20,594.29
  4. Step 4: Simplify right side
    68,640.01x = 2,119,891,364.13
  5. Step 5: Solve for x
    x = 2,119,891,364.13/68,640.01
  6. Step 6: Final answer
    x = 30,884.19

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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.