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Finding the Fourth Proportional to 68,810.61, 103,197.19 and 18,878.87

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Solution

The fourth proportional to 68,810.61, 103,197.19 and 18,878.87 is: 28,313.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,810.61 : 103,197.19 = 18,878.87 : x
  2. Step 2: Convert to fraction form
    68,810.61/103,197.19 = 18,878.87/x
  3. Step 3: Cross multiply
    68,810.61x = 103,197.19 × 18,878.87
  4. Step 4: Simplify right side
    68,810.61x = 1,948,246,580.57
  5. Step 5: Solve for x
    x = 1,948,246,580.57/68,810.61
  6. Step 6: Final answer
    x = 28,313.17

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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.