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Finding the Fourth Proportional to 68,651.70, 102,977.55 and 21,909.30

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Solution

The fourth proportional to 68,651.70, 102,977.55 and 21,909.30 is: 32,863.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,651.70 : 102,977.55 = 21,909.30 : x
  2. Step 2: Convert to fraction form
    68,651.70/102,977.55 = 21,909.30/x
  3. Step 3: Cross multiply
    68,651.70x = 102,977.55 × 21,909.30
  4. Step 4: Simplify right side
    68,651.70x = 2,256,166,036.22
  5. Step 5: Solve for x
    x = 2,256,166,036.22/68,651.70
  6. Step 6: Final answer
    x = 32,863.95

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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.