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Finding the Fourth Proportional to 80,935.40, 121,403.10 and 43,610.60

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Solution

The fourth proportional to 80,935.40, 121,403.10 and 43,610.60 is: 65,415.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,935.40 : 121,403.10 = 43,610.60 : x
  2. Step 2: Convert to fraction form
    80,935.40/121,403.10 = 43,610.60/x
  3. Step 3: Cross multiply
    80,935.40x = 121,403.10 × 43,610.60
  4. Step 4: Simplify right side
    80,935.40x = 5,294,462,032.86
  5. Step 5: Solve for x
    x = 5,294,462,032.86/80,935.40
  6. Step 6: Final answer
    x = 65,415.90

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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.