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Finding the Fourth Proportional to 68,838.30, 103,257.45 and 53,286.30

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Solution

The fourth proportional to 68,838.30, 103,257.45 and 53,286.30 is: 79,929.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,838.30 : 103,257.45 = 53,286.30 : x
  2. Step 2: Convert to fraction form
    68,838.30/103,257.45 = 53,286.30/x
  3. Step 3: Cross multiply
    68,838.30x = 103,257.45 × 53,286.30
  4. Step 4: Simplify right side
    68,838.30x = 5,502,207,457.94
  5. Step 5: Solve for x
    x = 5,502,207,457.94/68,838.30
  6. Step 6: Final answer
    x = 79,929.45

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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.