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Finding the Fourth Proportional to 70,811.79, 97,720.88 and 38,982.99

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Solution

The fourth proportional to 70,811.79, 97,720.88 and 38,982.99 is: 53,796.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,811.79 : 97,720.88 = 38,982.99 : x
  2. Step 2: Convert to fraction form
    70,811.79/97,720.88 = 38,982.99/x
  3. Step 3: Cross multiply
    70,811.79x = 97,720.88 × 38,982.99
  4. Step 4: Simplify right side
    70,811.79x = 3,809,451,892.92
  5. Step 5: Solve for x
    x = 3,809,451,892.92/70,811.79
  6. Step 6: Final answer
    x = 53,796.86

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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.