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Finding the Fourth Proportional to 61,185.70, 91,778.55 and 42,523.30

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Solution

The fourth proportional to 61,185.70, 91,778.55 and 42,523.30 is: 63,784.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,185.70 : 91,778.55 = 42,523.30 : x
  2. Step 2: Convert to fraction form
    61,185.70/91,778.55 = 42,523.30/x
  3. Step 3: Cross multiply
    61,185.70x = 91,778.55 × 42,523.30
  4. Step 4: Simplify right side
    61,185.70x = 3,902,726,815.22
  5. Step 5: Solve for x
    x = 3,902,726,815.22/61,185.70
  6. Step 6: Final answer
    x = 63,784.95

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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.