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Finding the Fourth Proportional to 92,951.31, 139,418.42 and 30,621.81

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Solution

The fourth proportional to 92,951.31, 139,418.42 and 30,621.81 is: 45,929.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,951.31 : 139,418.42 = 30,621.81 : x
  2. Step 2: Convert to fraction form
    92,951.31/139,418.42 = 30,621.81/x
  3. Step 3: Cross multiply
    92,951.31x = 139,418.42 × 30,621.81
  4. Step 4: Simplify right side
    92,951.31x = 4,269,244,214.63
  5. Step 5: Solve for x
    x = 4,269,244,214.63/92,951.31
  6. Step 6: Final answer
    x = 45,929.90

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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.