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Finding the Fourth Proportional to 71,379.74, 98,495.83 and 39,540.54

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Solution

The fourth proportional to 71,379.74, 98,495.83 and 39,540.54 is: 54,561.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.74 : 98,495.83 = 39,540.54 : x
  2. Step 2: Convert to fraction form
    71,379.74/98,495.83 = 39,540.54/x
  3. Step 3: Cross multiply
    71,379.74x = 98,495.83 × 39,540.54
  4. Step 4: Simplify right side
    71,379.74x = 3,894,578,305.95
  5. Step 5: Solve for x
    x = 3,894,578,305.95/71,379.74
  6. Step 6: Final answer
    x = 54,561.40

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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.