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Finding the Fourth Proportional to 281,119.75, 421,679.28 and 91,579.81

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Solution

The fourth proportional to 281,119.75, 421,679.28 and 91,579.81 is: 137,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,119.75 : 421,679.28 = 91,579.81 : x
  2. Step 2: Convert to fraction form
    281,119.75/421,679.28 = 91,579.81/x
  3. Step 3: Cross multiply
    281,119.75x = 421,679.28 × 91,579.81
  4. Step 4: Simplify right side
    281,119.75x = 38,617,308,343.34
  5. Step 5: Solve for x
    x = 38,617,308,343.34/281,119.75
  6. Step 6: Final answer
    x = 137,369.60

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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.