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Finding the Fourth Proportional to 91,857.60, 137,786.40 and 52,418.70

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Solution

The fourth proportional to 91,857.60, 137,786.40 and 52,418.70 is: 78,628.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,857.60 : 137,786.40 = 52,418.70 : x
  2. Step 2: Convert to fraction form
    91,857.60/137,786.40 = 52,418.70/x
  3. Step 3: Cross multiply
    91,857.60x = 137,786.40 × 52,418.70
  4. Step 4: Simplify right side
    91,857.60x = 7,222,583,965.68
  5. Step 5: Solve for x
    x = 7,222,583,965.68/91,857.60
  6. Step 6: Final answer
    x = 78,628.05

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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.