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Finding the Fourth Proportional to 68,896.77, 103,349.01 and 21,518.40

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Solution

The fourth proportional to 68,896.77, 103,349.01 and 21,518.40 is: 32,278.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,896.77 : 103,349.01 = 21,518.40 : x
  2. Step 2: Convert to fraction form
    68,896.77/103,349.01 = 21,518.40/x
  3. Step 3: Cross multiply
    68,896.77x = 103,349.01 × 21,518.40
  4. Step 4: Simplify right side
    68,896.77x = 2,223,905,336.78
  5. Step 5: Solve for x
    x = 2,223,905,336.78/68,896.77
  6. Step 6: Final answer
    x = 32,278.80

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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.