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Finding the Fourth Proportional to 55,266.60, 82,986.30 and 31,938.60

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Solution

The fourth proportional to 55,266.60, 82,986.30 and 31,938.60 is: 47,957.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,266.60 : 82,986.30 = 31,938.60 : x
  2. Step 2: Convert to fraction form
    55,266.60/82,986.30 = 31,938.60/x
  3. Step 3: Cross multiply
    55,266.60x = 82,986.30 × 31,938.60
  4. Step 4: Simplify right side
    55,266.60x = 2,650,466,241.18
  5. Step 5: Solve for x
    x = 2,650,466,241.18/55,266.60
  6. Step 6: Final answer
    x = 47,957.83

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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.