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Finding the Fourth Proportional to 259,589.08, 389,384.42 and 72,602.20

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Solution

The fourth proportional to 259,589.08, 389,384.42 and 72,602.20 is: 108,903.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,589.08 : 389,384.42 = 72,602.20 : x
  2. Step 2: Convert to fraction form
    259,589.08/389,384.42 = 72,602.20/x
  3. Step 3: Cross multiply
    259,589.08x = 389,384.42 × 72,602.20
  4. Step 4: Simplify right side
    259,589.08x = 28,270,165,537.72
  5. Step 5: Solve for x
    x = 28,270,165,537.72/259,589.08
  6. Step 6: Final answer
    x = 108,903.52

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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.