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Finding the Fourth Proportional to 61,761.60, 92,685.60 and 39,628.80

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Solution

The fourth proportional to 61,761.60, 92,685.60 and 39,628.80 is: 59,470.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,761.60 : 92,685.60 = 39,628.80 : x
  2. Step 2: Convert to fraction form
    61,761.60/92,685.60 = 39,628.80/x
  3. Step 3: Cross multiply
    61,761.60x = 92,685.60 × 39,628.80
  4. Step 4: Simplify right side
    61,761.60x = 3,673,019,105.28
  5. Step 5: Solve for x
    x = 3,673,019,105.28/61,761.60
  6. Step 6: Final answer
    x = 59,470.92

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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.