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Finding the Fourth Proportional to 109,626.90, 164,440.35 and 91,912.20

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Solution

The fourth proportional to 109,626.90, 164,440.35 and 91,912.20 is: 137,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,626.90 : 164,440.35 = 91,912.20 : x
  2. Step 2: Convert to fraction form
    109,626.90/164,440.35 = 91,912.20/x
  3. Step 3: Cross multiply
    109,626.90x = 164,440.35 × 91,912.20
  4. Step 4: Simplify right side
    109,626.90x = 15,114,074,337.27
  5. Step 5: Solve for x
    x = 15,114,074,337.27/109,626.90
  6. Step 6: Final answer
    x = 137,868.30

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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.