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Finding the Fourth Proportional to 231,004.80, 318,791.88 and 135,580.32

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Solution

The fourth proportional to 231,004.80, 318,791.88 and 135,580.32 is: 187,103.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,004.80 : 318,791.88 = 135,580.32 : x
  2. Step 2: Convert to fraction form
    231,004.80/318,791.88 = 135,580.32/x
  3. Step 3: Cross multiply
    231,004.80x = 318,791.88 × 135,580.32
  4. Step 4: Simplify right side
    231,004.80x = 43,221,905,103.80
  5. Step 5: Solve for x
    x = 43,221,905,103.80/231,004.80
  6. Step 6: Final answer
    x = 187,103.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.