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Finding the Fourth Proportional to 260,090.52, 390,149.26 and 82,611.40

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Solution

The fourth proportional to 260,090.52, 390,149.26 and 82,611.40 is: 123,921.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,090.52 : 390,149.26 = 82,611.40 : x
  2. Step 2: Convert to fraction form
    260,090.52/390,149.26 = 82,611.40/x
  3. Step 3: Cross multiply
    260,090.52x = 390,149.26 × 82,611.40
  4. Step 4: Simplify right side
    260,090.52x = 32,230,776,577.56
  5. Step 5: Solve for x
    x = 32,230,776,577.56/260,090.52
  6. Step 6: Final answer
    x = 123,921.38

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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.