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Finding the Fourth Proportional to 69,431.51, 95,809.94 and 39,219.76

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Solution

The fourth proportional to 69,431.51, 95,809.94 and 39,219.76 is: 54,120.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,431.51 : 95,809.94 = 39,219.76 : x
  2. Step 2: Convert to fraction form
    69,431.51/95,809.94 = 39,219.76/x
  3. Step 3: Cross multiply
    69,431.51x = 95,809.94 × 39,219.76
  4. Step 4: Simplify right side
    69,431.51x = 3,757,642,923.15
  5. Step 5: Solve for x
    x = 3,757,642,923.15/69,431.51
  6. Step 6: Final answer
    x = 54,120.14

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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.