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Finding the Fourth Proportional to 61,437.60, 91,983.60 and 55,216.80

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Solution

The fourth proportional to 61,437.60, 91,983.60 and 55,216.80 is: 82,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,437.60 : 91,983.60 = 55,216.80 : x
  2. Step 2: Convert to fraction form
    61,437.60/91,983.60 = 55,216.80/x
  3. Step 3: Cross multiply
    61,437.60x = 91,983.60 × 55,216.80
  4. Step 4: Simplify right side
    61,437.60x = 5,079,040,044.48
  5. Step 5: Solve for x
    x = 5,079,040,044.48/61,437.60
  6. Step 6: Final answer
    x = 82,669.90

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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.