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Finding the Fourth Proportional to 259,796.36, 389,719.38 and 72,807.32

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Solution

The fourth proportional to 259,796.36, 389,719.38 and 72,807.32 is: 109,217.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,796.36 : 389,719.38 = 72,807.32 : x
  2. Step 2: Convert to fraction form
    259,796.36/389,719.38 = 72,807.32/x
  3. Step 3: Cross multiply
    259,796.36x = 389,719.38 × 72,807.32
  4. Step 4: Simplify right side
    259,796.36x = 28,374,423,609.86
  5. Step 5: Solve for x
    x = 28,374,423,609.86/259,796.36
  6. Step 6: Final answer
    x = 109,217.94

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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.