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Finding the Fourth Proportional to 61,212.40, 91,818.60 and 34,919.80

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Solution

The fourth proportional to 61,212.40, 91,818.60 and 34,919.80 is: 52,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212.40 : 91,818.60 = 34,919.80 : x
  2. Step 2: Convert to fraction form
    61,212.40/91,818.60 = 34,919.80/x
  3. Step 3: Cross multiply
    61,212.40x = 91,818.60 × 34,919.80
  4. Step 4: Simplify right side
    61,212.40x = 3,206,287,148.28
  5. Step 5: Solve for x
    x = 3,206,287,148.28/61,212.40
  6. Step 6: Final answer
    x = 52,379.70

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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.