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Finding the Fourth Proportional to 84,945.30, 127,454.40 and 43,392.30

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Solution

The fourth proportional to 84,945.30, 127,454.40 and 43,392.30 is: 65,107.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,945.30 : 127,454.40 = 43,392.30 : x
  2. Step 2: Convert to fraction form
    84,945.30/127,454.40 = 43,392.30/x
  3. Step 3: Cross multiply
    84,945.30x = 127,454.40 × 43,392.30
  4. Step 4: Simplify right side
    84,945.30x = 5,530,539,561.12
  5. Step 5: Solve for x
    x = 5,530,539,561.12/84,945.30
  6. Step 6: Final answer
    x = 65,107.07

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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.