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Finding the Fourth Proportional to 111,977.97, 167,572.47 and 69,877.88

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Solution

The fourth proportional to 111,977.97, 167,572.47 and 69,877.88 is: 104,570.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,977.97 : 167,572.47 = 69,877.88 : x
  2. Step 2: Convert to fraction form
    111,977.97/167,572.47 = 69,877.88/x
  3. Step 3: Cross multiply
    111,977.97x = 167,572.47 × 69,877.88
  4. Step 4: Simplify right side
    111,977.97x = 11,709,608,112.10
  5. Step 5: Solve for x
    x = 11,709,608,112.10/111,977.97
  6. Step 6: Final answer
    x = 104,570.64

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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.