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Finding the Fourth Proportional to 70,986.62, 97,960.02 and 39,158.48

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Solution

The fourth proportional to 70,986.62, 97,960.02 and 39,158.48 is: 54,037.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,986.62 : 97,960.02 = 39,158.48 : x
  2. Step 2: Convert to fraction form
    70,986.62/97,960.02 = 39,158.48/x
  3. Step 3: Cross multiply
    70,986.62x = 97,960.02 × 39,158.48
  4. Step 4: Simplify right side
    70,986.62x = 3,835,965,483.97
  5. Step 5: Solve for x
    x = 3,835,965,483.97/70,986.62
  6. Step 6: Final answer
    x = 54,037.87

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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.