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Finding the Fourth Proportional to 68,880.81, 103,307.52 and 18,948

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Solution

The fourth proportional to 68,880.81, 103,307.52 and 18,948 is: 28,418.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,880.81 : 103,307.52 = 18,948 : x
  2. Step 2: Convert to fraction form
    68,880.81/103,307.52 = 18,948/x
  3. Step 3: Cross multiply
    68,880.81x = 103,307.52 × 18,948
  4. Step 4: Simplify right side
    68,880.81x = 1,957,470,888.96
  5. Step 5: Solve for x
    x = 1,957,470,888.96/68,880.81
  6. Step 6: Final answer
    x = 28,418.23

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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.