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Finding the Fourth Proportional to 69,931.56, 96,505.66 and 39,716.88

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Solution

The fourth proportional to 69,931.56, 96,505.66 and 39,716.88 is: 54,809.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,931.56 : 96,505.66 = 39,716.88 : x
  2. Step 2: Convert to fraction form
    69,931.56/96,505.66 = 39,716.88/x
  3. Step 3: Cross multiply
    69,931.56x = 96,505.66 × 39,716.88
  4. Step 4: Simplify right side
    69,931.56x = 3,832,903,717.54
  5. Step 5: Solve for x
    x = 3,832,903,717.54/69,931.56
  6. Step 6: Final answer
    x = 54,809.36

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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.