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Finding the Fourth Proportional to 133,042.80, 199,272.60 and 118,268.40

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Solution

The fourth proportional to 133,042.80, 199,272.60 and 118,268.40 is: 177,143.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,042.80 : 199,272.60 = 118,268.40 : x
  2. Step 2: Convert to fraction form
    133,042.80/199,272.60 = 118,268.40/x
  3. Step 3: Cross multiply
    133,042.80x = 199,272.60 × 118,268.40
  4. Step 4: Simplify right side
    133,042.80x = 23,567,651,565.84
  5. Step 5: Solve for x
    x = 23,567,651,565.84/133,042.80
  6. Step 6: Final answer
    x = 177,143.38

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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.