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Finding the Fourth Proportional to 71,574.87, 98,772.78 and 39,743.88

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Solution

The fourth proportional to 71,574.87, 98,772.78 and 39,743.88 is: 54,846.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,574.87 : 98,772.78 = 39,743.88 : x
  2. Step 2: Convert to fraction form
    71,574.87/98,772.78 = 39,743.88/x
  3. Step 3: Cross multiply
    71,574.87x = 98,772.78 × 39,743.88
  4. Step 4: Simplify right side
    71,574.87x = 3,925,613,515.59
  5. Step 5: Solve for x
    x = 3,925,613,515.59/71,574.87
  6. Step 6: Final answer
    x = 54,846.25

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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.