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Finding the Fourth Proportional to 103,439.56, 155,120.91 and 36,862

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Solution

The fourth proportional to 103,439.56, 155,120.91 and 36,862 is: 55,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,439.56 : 155,120.91 = 36,862 : x
  2. Step 2: Convert to fraction form
    103,439.56/155,120.91 = 36,862/x
  3. Step 3: Cross multiply
    103,439.56x = 155,120.91 × 36,862
  4. Step 4: Simplify right side
    103,439.56x = 5,718,066,984.42
  5. Step 5: Solve for x
    x = 5,718,066,984.42/103,439.56
  6. Step 6: Final answer
    x = 55,279.30

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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.