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Finding the Fourth Proportional to 111,998.40, 167,767.20 and 76,977.60

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Solution

The fourth proportional to 111,998.40, 167,767.20 and 76,977.60 is: 115,308.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,998.40 : 167,767.20 = 76,977.60 : x
  2. Step 2: Convert to fraction form
    111,998.40/167,767.20 = 76,977.60/x
  3. Step 3: Cross multiply
    111,998.40x = 167,767.20 × 76,977.60
  4. Step 4: Simplify right side
    111,998.40x = 12,914,316,414.72
  5. Step 5: Solve for x
    x = 12,914,316,414.72/111,998.40
  6. Step 6: Final answer
    x = 115,308.04

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1.5x scale

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.