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Finding the Fourth Proportional to 109,722.30, 164,583.45 and 82,074.30

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Solution

The fourth proportional to 109,722.30, 164,583.45 and 82,074.30 is: 123,111.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,722.30 : 164,583.45 = 82,074.30 : x
  2. Step 2: Convert to fraction form
    109,722.30/164,583.45 = 82,074.30/x
  3. Step 3: Cross multiply
    109,722.30x = 164,583.45 × 82,074.30
  4. Step 4: Simplify right side
    109,722.30x = 13,508,071,450.34
  5. Step 5: Solve for x
    x = 13,508,071,450.34/109,722.30
  6. Step 6: Final answer
    x = 123,111.45

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Similar ratio
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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.