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Finding the Fourth Proportional to 61,205.60, 91,808.40 and 31,613.60

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Solution

The fourth proportional to 61,205.60, 91,808.40 and 31,613.60 is: 47,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,205.60 : 91,808.40 = 31,613.60 : x
  2. Step 2: Convert to fraction form
    61,205.60/91,808.40 = 31,613.60/x
  3. Step 3: Cross multiply
    61,205.60x = 91,808.40 × 31,613.60
  4. Step 4: Simplify right side
    61,205.60x = 2,902,394,034.24
  5. Step 5: Solve for x
    x = 2,902,394,034.24/61,205.60
  6. Step 6: Final answer
    x = 47,420.40

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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.