Home / 80,942.80-121,356.60-31,003.60

Finding the Fourth Proportional to 80,942.80, 121,356.60 and 31,003.60

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Solution

The fourth proportional to 80,942.80, 121,356.60 and 31,003.60 is: 46,483.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,942.80 : 121,356.60 = 31,003.60 : x
  2. Step 2: Convert to fraction form
    80,942.80/121,356.60 = 31,003.60/x
  3. Step 3: Cross multiply
    80,942.80x = 121,356.60 × 31,003.60
  4. Step 4: Simplify right side
    80,942.80x = 3,762,491,483.76
  5. Step 5: Solve for x
    x = 3,762,491,483.76/80,942.80
  6. Step 6: Final answer
    x = 46,483.34

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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.