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Finding the Fourth Proportional to 259,599.60, 389,439.90 and 82,089.72

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Solution

The fourth proportional to 259,599.60, 389,439.90 and 82,089.72 is: 123,147.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,599.60 : 389,439.90 = 82,089.72 : x
  2. Step 2: Convert to fraction form
    259,599.60/389,439.90 = 82,089.72/x
  3. Step 3: Cross multiply
    259,599.60x = 389,439.90 × 82,089.72
  4. Step 4: Simplify right side
    259,599.60x = 31,969,012,347.83
  5. Step 5: Solve for x
    x = 31,969,012,347.83/259,599.60
  6. Step 6: Final answer
    x = 123,147.39

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1.5x scale

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.