Home / 287,629.60-431,120.40-137,941.60

Finding the Fourth Proportional to 287,629.60, 431,120.40 and 137,941.60

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Solution

The fourth proportional to 287,629.60, 431,120.40 and 137,941.60 is: 206,757.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,629.60 : 431,120.40 = 137,941.60 : x
  2. Step 2: Convert to fraction form
    287,629.60/431,120.40 = 137,941.60/x
  3. Step 3: Cross multiply
    287,629.60x = 431,120.40 × 137,941.60
  4. Step 4: Simplify right side
    287,629.60x = 59,469,437,768.64
  5. Step 5: Solve for x
    x = 59,469,437,768.64/287,629.60
  6. Step 6: Final answer
    x = 206,757.02

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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.