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Finding the Fourth Proportional to 71,989.64, 107,985.42 and 25,243.88

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Solution

The fourth proportional to 71,989.64, 107,985.42 and 25,243.88 is: 37,866.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,989.64 : 107,985.42 = 25,243.88 : x
  2. Step 2: Convert to fraction form
    71,989.64/107,985.42 = 25,243.88/x
  3. Step 3: Cross multiply
    71,989.64x = 107,985.42 × 25,243.88
  4. Step 4: Simplify right side
    71,989.64x = 2,725,970,984.23
  5. Step 5: Solve for x
    x = 2,725,970,984.23/71,989.64
  6. Step 6: Final answer
    x = 37,866.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.