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Finding the Fourth Proportional to 61,169.08, 84,400.50 and 39,979.48

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Solution

The fourth proportional to 61,169.08, 84,400.50 and 39,979.48 is: 55,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,169.08 : 84,400.50 = 39,979.48 : x
  2. Step 2: Convert to fraction form
    61,169.08/84,400.50 = 39,979.48/x
  3. Step 3: Cross multiply
    61,169.08x = 84,400.50 × 39,979.48
  4. Step 4: Simplify right side
    61,169.08x = 3,374,288,101.74
  5. Step 5: Solve for x
    x = 3,374,288,101.74/61,169.08
  6. Step 6: Final answer
    x = 55,163.30

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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.