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Finding the Fourth Proportional to 139,380.48, 209,485.44 and 65,560.32

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Solution

The fourth proportional to 139,380.48, 209,485.44 and 65,560.32 is: 98,535.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,380.48 : 209,485.44 = 65,560.32 : x
  2. Step 2: Convert to fraction form
    139,380.48/209,485.44 = 65,560.32/x
  3. Step 3: Cross multiply
    139,380.48x = 209,485.44 × 65,560.32
  4. Step 4: Simplify right side
    139,380.48x = 13,733,932,481.74
  5. Step 5: Solve for x
    x = 13,733,932,481.74/139,380.48
  6. Step 6: Final answer
    x = 98,535.55

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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.