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Finding the Fourth Proportional to 68,141.52, 102,206.88 and 21,393.18

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Solution

The fourth proportional to 68,141.52, 102,206.88 and 21,393.18 is: 32,088.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,141.52 : 102,206.88 = 21,393.18 : x
  2. Step 2: Convert to fraction form
    68,141.52/102,206.88 = 21,393.18/x
  3. Step 3: Cross multiply
    68,141.52x = 102,206.88 × 21,393.18
  4. Step 4: Simplify right side
    68,141.52x = 2,186,530,181.08
  5. Step 5: Solve for x
    x = 2,186,530,181.08/68,141.52
  6. Step 6: Final answer
    x = 32,088.07

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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.