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Finding the Fourth Proportional to 71,468.90, 98,620.62 and 39,637.70

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Solution

The fourth proportional to 71,468.90, 98,620.62 and 39,637.70 is: 54,696.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,468.90 : 98,620.62 = 39,637.70 : x
  2. Step 2: Convert to fraction form
    71,468.90/98,620.62 = 39,637.70/x
  3. Step 3: Cross multiply
    71,468.90x = 98,620.62 × 39,637.70
  4. Step 4: Simplify right side
    71,468.90x = 3,909,094,549.37
  5. Step 5: Solve for x
    x = 3,909,094,549.37/71,468.90
  6. Step 6: Final answer
    x = 54,696.44

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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.