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Finding the Fourth Proportional to 61,879.68, 85,351.68 and 39,513.60

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Solution

The fourth proportional to 61,879.68, 85,351.68 and 39,513.60 is: 54,501.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,879.68 : 85,351.68 = 39,513.60 : x
  2. Step 2: Convert to fraction form
    61,879.68/85,351.68 = 39,513.60/x
  3. Step 3: Cross multiply
    61,879.68x = 85,351.68 × 39,513.60
  4. Step 4: Simplify right side
    61,879.68x = 3,372,552,142.85
  5. Step 5: Solve for x
    x = 3,372,552,142.85/61,879.68
  6. Step 6: Final answer
    x = 54,501.77

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1.5x scale

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.