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Finding the Fourth Proportional to 70,991.38, 97,960.53 and 39,160.28

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Solution

The fourth proportional to 70,991.38, 97,960.53 and 39,160.28 is: 54,037.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,991.38 : 97,960.53 = 39,160.28 : x
  2. Step 2: Convert to fraction form
    70,991.38/97,960.53 = 39,160.28/x
  3. Step 3: Cross multiply
    70,991.38x = 97,960.53 × 39,160.28
  4. Step 4: Simplify right side
    70,991.38x = 3,836,161,391.85
  5. Step 5: Solve for x
    x = 3,836,161,391.85/70,991.38
  6. Step 6: Final answer
    x = 54,037.01

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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.