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Finding the Fourth Proportional to 80,969.40, 121,367.70 and 31,030.20

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Solution

The fourth proportional to 80,969.40, 121,367.70 and 31,030.20 is: 46,512.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,969.40 : 121,367.70 = 31,030.20 : x
  2. Step 2: Convert to fraction form
    80,969.40/121,367.70 = 31,030.20/x
  3. Step 3: Cross multiply
    80,969.40x = 121,367.70 × 31,030.20
  4. Step 4: Simplify right side
    80,969.40x = 3,766,064,004.54
  5. Step 5: Solve for x
    x = 3,766,064,004.54/80,969.40
  6. Step 6: Final answer
    x = 46,512.19

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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.