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Finding the Fourth Proportional to 71,276.74, 98,357.82 and 39,443.74

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Solution

The fourth proportional to 71,276.74, 98,357.82 and 39,443.74 is: 54,430.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,276.74 : 98,357.82 = 39,443.74 : x
  2. Step 2: Convert to fraction form
    71,276.74/98,357.82 = 39,443.74/x
  3. Step 3: Cross multiply
    71,276.74x = 98,357.82 × 39,443.74
  4. Step 4: Simplify right side
    71,276.74x = 3,879,600,279.05
  5. Step 5: Solve for x
    x = 3,879,600,279.05/71,276.74
  6. Step 6: Final answer
    x = 54,430.10

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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.