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Finding the Fourth Proportional to 68,749.20, 103,200.60 and 64,237.20

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Solution

The fourth proportional to 68,749.20, 103,200.60 and 64,237.20 is: 96,427.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,749.20 : 103,200.60 = 64,237.20 : x
  2. Step 2: Convert to fraction form
    68,749.20/103,200.60 = 64,237.20/x
  3. Step 3: Cross multiply
    68,749.20x = 103,200.60 × 64,237.20
  4. Step 4: Simplify right side
    68,749.20x = 6,629,317,582.32
  5. Step 5: Solve for x
    x = 6,629,317,582.32/68,749.20
  6. Step 6: Final answer
    x = 96,427.56

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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.