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Finding the Fourth Proportional to 92,945.80, 139,418.70 and 84,635.20

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Solution

The fourth proportional to 92,945.80, 139,418.70 and 84,635.20 is: 126,952.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,945.80 : 139,418.70 = 84,635.20 : x
  2. Step 2: Convert to fraction form
    92,945.80/139,418.70 = 84,635.20/x
  3. Step 3: Cross multiply
    92,945.80x = 139,418.70 × 84,635.20
  4. Step 4: Simplify right side
    92,945.80x = 11,799,729,558.24
  5. Step 5: Solve for x
    x = 11,799,729,558.24/92,945.80
  6. Step 6: Final answer
    x = 126,952.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.