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Finding the Fourth Proportional to 80,784.90, 121,201.65 and 43,362.90

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Solution

The fourth proportional to 80,784.90, 121,201.65 and 43,362.90 is: 65,057.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,784.90 : 121,201.65 = 43,362.90 : x
  2. Step 2: Convert to fraction form
    80,784.90/121,201.65 = 43,362.90/x
  3. Step 3: Cross multiply
    80,784.90x = 121,201.65 × 43,362.90
  4. Step 4: Simplify right side
    80,784.90x = 5,255,655,028.79
  5. Step 5: Solve for x
    x = 5,255,655,028.79/80,784.90
  6. Step 6: Final answer
    x = 65,057.39

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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.