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Finding the Fourth Proportional to 68,712.48, 103,069.20 and 21,967.20

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Solution

The fourth proportional to 68,712.48, 103,069.20 and 21,967.20 is: 32,950.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,712.48 : 103,069.20 = 21,967.20 : x
  2. Step 2: Convert to fraction form
    68,712.48/103,069.20 = 21,967.20/x
  3. Step 3: Cross multiply
    68,712.48x = 103,069.20 × 21,967.20
  4. Step 4: Simplify right side
    68,712.48x = 2,264,141,730.24
  5. Step 5: Solve for x
    x = 2,264,141,730.24/68,712.48
  6. Step 6: Final answer
    x = 32,950.95

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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.