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Finding the Fourth Proportional to 61,310.04, 91,928.10 and 39,978.60

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Solution

The fourth proportional to 61,310.04, 91,928.10 and 39,978.60 is: 59,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,310.04 : 91,928.10 = 39,978.60 : x
  2. Step 2: Convert to fraction form
    61,310.04/91,928.10 = 39,978.60/x
  3. Step 3: Cross multiply
    61,310.04x = 91,928.10 × 39,978.60
  4. Step 4: Simplify right side
    61,310.04x = 3,675,156,738.66
  5. Step 5: Solve for x
    x = 3,675,156,738.66/61,310.04
  6. Step 6: Final answer
    x = 59,943.80

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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.