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Finding the Fourth Proportional to 68,748, 103,121.84 and 18,828.48

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Solution

The fourth proportional to 68,748, 103,121.84 and 18,828.48 is: 28,242.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,748 : 103,121.84 = 18,828.48 : x
  2. Step 2: Convert to fraction form
    68,748/103,121.84 = 18,828.48/x
  3. Step 3: Cross multiply
    68,748x = 103,121.84 × 18,828.48
  4. Step 4: Simplify right side
    68,748x = 1,941,627,502.00
  5. Step 5: Solve for x
    x = 1,941,627,502.00/68,748
  6. Step 6: Final answer
    x = 28,242.68

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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.