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Finding the Fourth Proportional to 111,150.75, 166,725.86 and 85,887.01

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Solution

The fourth proportional to 111,150.75, 166,725.86 and 85,887.01 is: 128,830.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,150.75 : 166,725.86 = 85,887.01 : x
  2. Step 2: Convert to fraction form
    111,150.75/166,725.86 = 85,887.01/x
  3. Step 3: Cross multiply
    111,150.75x = 166,725.86 × 85,887.01
  4. Step 4: Simplify right side
    111,150.75x = 14,319,585,402.98
  5. Step 5: Solve for x
    x = 14,319,585,402.98/111,150.75
  6. Step 6: Final answer
    x = 128,830.31

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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.