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Finding the Fourth Proportional to 92,940, 139,331.61 and 40,309.84

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Solution

The fourth proportional to 92,940, 139,331.61 and 40,309.84 is: 60,430.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,940 : 139,331.61 = 40,309.84 : x
  2. Step 2: Convert to fraction form
    92,940/139,331.61 = 40,309.84/x
  3. Step 3: Cross multiply
    92,940x = 139,331.61 × 40,309.84
  4. Step 4: Simplify right side
    92,940x = 5,616,434,906.04
  5. Step 5: Solve for x
    x = 5,616,434,906.04/92,940
  6. Step 6: Final answer
    x = 60,430.76

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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.