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Finding the Fourth Proportional to 259,806.63, 389,666.03 and 72,775.11

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Solution

The fourth proportional to 259,806.63, 389,666.03 and 72,775.11 is: 109,150.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,806.63 : 389,666.03 = 72,775.11 : x
  2. Step 2: Convert to fraction form
    259,806.63/389,666.03 = 72,775.11/x
  3. Step 3: Cross multiply
    259,806.63x = 389,666.03 × 72,775.11
  4. Step 4: Simplify right side
    259,806.63x = 28,357,987,832.64
  5. Step 5: Solve for x
    x = 28,357,987,832.64/259,806.63
  6. Step 6: Final answer
    x = 109,150.36

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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.