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Finding the Fourth Proportional to 111,325.44, 166,813.08 and 86,086.56

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Solution

The fourth proportional to 111,325.44, 166,813.08 and 86,086.56 is: 128,994.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,325.44 : 166,813.08 = 86,086.56 : x
  2. Step 2: Convert to fraction form
    111,325.44/166,813.08 = 86,086.56/x
  3. Step 3: Cross multiply
    111,325.44x = 166,813.08 × 86,086.56
  4. Step 4: Simplify right side
    111,325.44x = 14,360,364,220.20
  5. Step 5: Solve for x
    x = 14,360,364,220.20/111,325.44
  6. Step 6: Final answer
    x = 128,994.45

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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.