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Finding the Fourth Proportional to 69,847.76, 96,385.72 and 39,218.60

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Solution

The fourth proportional to 69,847.76, 96,385.72 and 39,218.60 is: 54,119.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,847.76 : 96,385.72 = 39,218.60 : x
  2. Step 2: Convert to fraction form
    69,847.76/96,385.72 = 39,218.60/x
  3. Step 3: Cross multiply
    69,847.76x = 96,385.72 × 39,218.60
  4. Step 4: Simplify right side
    69,847.76x = 3,780,112,998.39
  5. Step 5: Solve for x
    x = 3,780,112,998.39/69,847.76
  6. Step 6: Final answer
    x = 54,119.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.