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Finding the Fourth Proportional to 68,880.87, 103,309.20 and 18,948.93

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Solution

The fourth proportional to 68,880.87, 103,309.20 and 18,948.93 is: 28,420.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,880.87 : 103,309.20 = 18,948.93 : x
  2. Step 2: Convert to fraction form
    68,880.87/103,309.20 = 18,948.93/x
  3. Step 3: Cross multiply
    68,880.87x = 103,309.20 × 18,948.93
  4. Step 4: Simplify right side
    68,880.87x = 1,957,598,799.16
  5. Step 5: Solve for x
    x = 1,957,598,799.16/68,880.87
  6. Step 6: Final answer
    x = 28,420.06

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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.