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Finding the Fourth Proportional to 92,701.20, 139,043.70 and 30,371.70

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Solution

The fourth proportional to 92,701.20, 139,043.70 and 30,371.70 is: 45,554.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,701.20 : 139,043.70 = 30,371.70 : x
  2. Step 2: Convert to fraction form
    92,701.20/139,043.70 = 30,371.70/x
  3. Step 3: Cross multiply
    92,701.20x = 139,043.70 × 30,371.70
  4. Step 4: Simplify right side
    92,701.20x = 4,222,993,543.29
  5. Step 5: Solve for x
    x = 4,222,993,543.29/92,701.20
  6. Step 6: Final answer
    x = 45,554.90

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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.