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Finding the Fourth Proportional to 68,881.95, 103,323.51 and 18,964.83

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Solution

The fourth proportional to 68,881.95, 103,323.51 and 18,964.83 is: 28,447.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,881.95 : 103,323.51 = 18,964.83 : x
  2. Step 2: Convert to fraction form
    68,881.95/103,323.51 = 18,964.83/x
  3. Step 3: Cross multiply
    68,881.95x = 103,323.51 × 18,964.83
  4. Step 4: Simplify right side
    68,881.95x = 1,959,512,802.15
  5. Step 5: Solve for x
    x = 1,959,512,802.15/68,881.95
  6. Step 6: Final answer
    x = 28,447.41

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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.