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Finding the Fourth Proportional to 109,314.99, 163,602.12 and 67,221.73

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Solution

The fourth proportional to 109,314.99, 163,602.12 and 67,221.73 is: 100,604.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,314.99 : 163,602.12 = 67,221.73 : x
  2. Step 2: Convert to fraction form
    109,314.99/163,602.12 = 67,221.73/x
  3. Step 3: Cross multiply
    109,314.99x = 163,602.12 × 67,221.73
  4. Step 4: Simplify right side
    109,314.99x = 10,997,617,381.14
  5. Step 5: Solve for x
    x = 10,997,617,381.14/109,314.99
  6. Step 6: Final answer
    x = 100,604.85

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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.