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Finding the Fourth Proportional to 61,980.78, 85,377.16 and 50,010.60

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Solution

The fourth proportional to 61,980.78, 85,377.16 and 50,010.60 is: 68,888.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,980.78 : 85,377.16 = 50,010.60 : x
  2. Step 2: Convert to fraction form
    61,980.78/85,377.16 = 50,010.60/x
  3. Step 3: Cross multiply
    61,980.78x = 85,377.16 × 50,010.60
  4. Step 4: Simplify right side
    61,980.78x = 4,269,762,997.90
  5. Step 5: Solve for x
    x = 4,269,762,997.90/61,980.78
  6. Step 6: Final answer
    x = 68,888.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.