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Finding the Fourth Proportional to 33,985.80, 50,978.70 and 25,691.40

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Solution

The fourth proportional to 33,985.80, 50,978.70 and 25,691.40 is: 38,537.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,985.80 : 50,978.70 = 25,691.40 : x
  2. Step 2: Convert to fraction form
    33,985.80/50,978.70 = 25,691.40/x
  3. Step 3: Cross multiply
    33,985.80x = 50,978.70 × 25,691.40
  4. Step 4: Simplify right side
    33,985.80x = 1,309,714,173.18
  5. Step 5: Solve for x
    x = 1,309,714,173.18/33,985.80
  6. Step 6: Final answer
    x = 38,537.10

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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.