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Finding the Fourth Proportional to 260,108.40, 390,173.40 and 82,610.40

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Solution

The fourth proportional to 260,108.40, 390,173.40 and 82,610.40 is: 123,919.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,108.40 : 390,173.40 = 82,610.40 : x
  2. Step 2: Convert to fraction form
    260,108.40/390,173.40 = 82,610.40/x
  3. Step 3: Cross multiply
    260,108.40x = 390,173.40 × 82,610.40
  4. Step 4: Simplify right side
    260,108.40x = 32,232,380,643.36
  5. Step 5: Solve for x
    x = 32,232,380,643.36/260,108.40
  6. Step 6: Final answer
    x = 123,919.03

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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.