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Finding the Fourth Proportional to 111,987.75, 167,984.87 and 28,881.75

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Solution

The fourth proportional to 111,987.75, 167,984.87 and 28,881.75 is: 43,323.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,987.75 : 167,984.87 = 28,881.75 : x
  2. Step 2: Convert to fraction form
    111,987.75/167,984.87 = 28,881.75/x
  3. Step 3: Cross multiply
    111,987.75x = 167,984.87 × 28,881.75
  4. Step 4: Simplify right side
    111,987.75x = 4,851,697,019.12
  5. Step 5: Solve for x
    x = 4,851,697,019.12/111,987.75
  6. Step 6: Final answer
    x = 43,323.46

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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.