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Finding the Fourth Proportional to 92,821.80, 139,232.70 and 66,772.20

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Solution

The fourth proportional to 92,821.80, 139,232.70 and 66,772.20 is: 100,158.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,821.80 : 139,232.70 = 66,772.20 : x
  2. Step 2: Convert to fraction form
    92,821.80/139,232.70 = 66,772.20/x
  3. Step 3: Cross multiply
    92,821.80x = 139,232.70 × 66,772.20
  4. Step 4: Simplify right side
    92,821.80x = 9,296,873,690.94
  5. Step 5: Solve for x
    x = 9,296,873,690.94/92,821.80
  6. Step 6: Final answer
    x = 100,158.30

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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.