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Finding the Fourth Proportional to 74,879.50, 103,249.47 and 61,224.94

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Solution

The fourth proportional to 74,879.50, 103,249.47 and 61,224.94 is: 84,421.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,879.50 : 103,249.47 = 61,224.94 : x
  2. Step 2: Convert to fraction form
    74,879.50/103,249.47 = 61,224.94/x
  3. Step 3: Cross multiply
    74,879.50x = 103,249.47 × 61,224.94
  4. Step 4: Simplify right side
    74,879.50x = 6,321,442,605.78
  5. Step 5: Solve for x
    x = 6,321,442,605.78/74,879.50
  6. Step 6: Final answer
    x = 84,421.54

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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.