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Finding the Fourth Proportional to 111,041.40, 166,367.70 and 91,212.60

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Solution

The fourth proportional to 111,041.40, 166,367.70 and 91,212.60 is: 136,659.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,041.40 : 166,367.70 = 91,212.60 : x
  2. Step 2: Convert to fraction form
    111,041.40/166,367.70 = 91,212.60/x
  3. Step 3: Cross multiply
    111,041.40x = 166,367.70 × 91,212.60
  4. Step 4: Simplify right side
    111,041.40x = 15,174,830,473.02
  5. Step 5: Solve for x
    x = 15,174,830,473.02/111,041.40
  6. Step 6: Final answer
    x = 136,659.21

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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.