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Finding the Fourth Proportional to 111,989.40, 167,984.10 and 28,883.40

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Solution

The fourth proportional to 111,989.40, 167,984.10 and 28,883.40 is: 43,325.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989.40 : 167,984.10 = 28,883.40 : x
  2. Step 2: Convert to fraction form
    111,989.40/167,984.10 = 28,883.40/x
  3. Step 3: Cross multiply
    111,989.40x = 167,984.10 × 28,883.40
  4. Step 4: Simplify right side
    111,989.40x = 4,851,951,953.94
  5. Step 5: Solve for x
    x = 4,851,951,953.94/111,989.40
  6. Step 6: Final answer
    x = 43,325.10

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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.