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Finding the Fourth Proportional to 111,978.97, 167,573.97 and 69,878.88

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Solution

The fourth proportional to 111,978.97, 167,573.97 and 69,878.88 is: 104,572.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,978.97 : 167,573.97 = 69,878.88 : x
  2. Step 2: Convert to fraction form
    111,978.97/167,573.97 = 69,878.88/x
  3. Step 3: Cross multiply
    111,978.97x = 167,573.97 × 69,878.88
  4. Step 4: Simplify right side
    111,978.97x = 11,709,881,340.75
  5. Step 5: Solve for x
    x = 11,709,881,340.75/111,978.97
  6. Step 6: Final answer
    x = 104,572.15

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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.