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Finding the Fourth Proportional to 103,079.31, 154,473.17 and 43,855.35

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Solution

The fourth proportional to 103,079.31, 154,473.17 and 43,855.35 is: 65,720.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,079.31 : 154,473.17 = 43,855.35 : x
  2. Step 2: Convert to fraction form
    103,079.31/154,473.17 = 43,855.35/x
  3. Step 3: Cross multiply
    103,079.31x = 154,473.17 × 43,855.35
  4. Step 4: Simplify right side
    103,079.31x = 6,774,474,716.68
  5. Step 5: Solve for x
    x = 6,774,474,716.68/103,079.31
  6. Step 6: Final answer
    x = 65,720.99

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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.