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Finding the Fourth Proportional to 109,112.40, 163,822.20 and 67,640.40

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Solution

The fourth proportional to 109,112.40, 163,822.20 and 67,640.40 is: 101,555.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,112.40 : 163,822.20 = 67,640.40 : x
  2. Step 2: Convert to fraction form
    109,112.40/163,822.20 = 67,640.40/x
  3. Step 3: Cross multiply
    109,112.40x = 163,822.20 × 67,640.40
  4. Step 4: Simplify right side
    109,112.40x = 11,080,999,136.88
  5. Step 5: Solve for x
    x = 11,080,999,136.88/109,112.40
  6. Step 6: Final answer
    x = 101,555.82

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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.