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Finding the Fourth Proportional to 92,786.40, 139,179.60 and 40,298.40

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Solution

The fourth proportional to 92,786.40, 139,179.60 and 40,298.40 is: 60,447.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,786.40 : 139,179.60 = 40,298.40 : x
  2. Step 2: Convert to fraction form
    92,786.40/139,179.60 = 40,298.40/x
  3. Step 3: Cross multiply
    92,786.40x = 139,179.60 × 40,298.40
  4. Step 4: Simplify right side
    92,786.40x = 5,608,715,192.64
  5. Step 5: Solve for x
    x = 5,608,715,192.64/92,786.40
  6. Step 6: Final answer
    x = 60,447.60

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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.