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Finding the Fourth Proportional to 111,978.90, 167,968.35 and 111,201.30

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Solution

The fourth proportional to 111,978.90, 167,968.35 and 111,201.30 is: 166,801.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,978.90 : 167,968.35 = 111,201.30 : x
  2. Step 2: Convert to fraction form
    111,978.90/167,968.35 = 111,201.30/x
  3. Step 3: Cross multiply
    111,978.90x = 167,968.35 × 111,201.30
  4. Step 4: Simplify right side
    111,978.90x = 18,678,298,878.86
  5. Step 5: Solve for x
    x = 18,678,298,878.86/111,978.90
  6. Step 6: Final answer
    x = 166,801.95

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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.