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Finding the Fourth Proportional to 70,952.74, 97,910.31 and 39,121.90

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Solution

The fourth proportional to 70,952.74, 97,910.31 and 39,121.90 is: 53,985.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,952.74 : 97,910.31 = 39,121.90 : x
  2. Step 2: Convert to fraction form
    70,952.74/97,910.31 = 39,121.90/x
  3. Step 3: Cross multiply
    70,952.74x = 97,910.31 × 39,121.90
  4. Step 4: Simplify right side
    70,952.74x = 3,830,437,112.01
  5. Step 5: Solve for x
    x = 3,830,437,112.01/70,952.74
  6. Step 6: Final answer
    x = 53,985.76

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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.