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Finding the Fourth Proportional to 68,981.87, 103,417.00 and 21,572.57

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Solution

The fourth proportional to 68,981.87, 103,417.00 and 21,572.57 is: 32,341.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,981.87 : 103,417.00 = 21,572.57 : x
  2. Step 2: Convert to fraction form
    68,981.87/103,417.00 = 21,572.57/x
  3. Step 3: Cross multiply
    68,981.87x = 103,417.00 × 21,572.57
  4. Step 4: Simplify right side
    68,981.87x = 2,230,970,676.30
  5. Step 5: Solve for x
    x = 2,230,970,676.30/68,981.87
  6. Step 6: Final answer
    x = 32,341.41

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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.