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Finding the Fourth Proportional to 68,851.89, 103,264.47 and 18,919.17

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Solution

The fourth proportional to 68,851.89, 103,264.47 and 18,919.17 is: 28,375.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,851.89 : 103,264.47 = 18,919.17 : x
  2. Step 2: Convert to fraction form
    68,851.89/103,264.47 = 18,919.17/x
  3. Step 3: Cross multiply
    68,851.89x = 103,264.47 × 18,919.17
  4. Step 4: Simplify right side
    68,851.89x = 1,953,678,062.89
  5. Step 5: Solve for x
    x = 1,953,678,062.89/68,851.89
  6. Step 6: Final answer
    x = 28,375.08

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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.