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Finding the Fourth Proportional to 68,737.92, 103,119.84 and 21,978.24

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Solution

The fourth proportional to 68,737.92, 103,119.84 and 21,978.24 is: 32,971.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,737.92 : 103,119.84 = 21,978.24 : x
  2. Step 2: Convert to fraction form
    68,737.92/103,119.84 = 21,978.24/x
  3. Step 3: Cross multiply
    68,737.92x = 103,119.84 × 21,978.24
  4. Step 4: Simplify right side
    68,737.92x = 2,266,392,592.28
  5. Step 5: Solve for x
    x = 2,266,392,592.28/68,737.92
  6. Step 6: Final answer
    x = 32,971.50

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1.5x scale

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.