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Finding the Fourth Proportional to 111,631.84, 154,052.22 and 65,679.64

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Solution

The fourth proportional to 111,631.84, 154,052.22 and 65,679.64 is: 90,638.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,631.84 : 154,052.22 = 65,679.64 : x
  2. Step 2: Convert to fraction form
    111,631.84/154,052.22 = 65,679.64/x
  3. Step 3: Cross multiply
    111,631.84x = 154,052.22 × 65,679.64
  4. Step 4: Simplify right side
    111,631.84x = 10,118,094,350.80
  5. Step 5: Solve for x
    x = 10,118,094,350.80/111,631.84
  6. Step 6: Final answer
    x = 90,638.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.