Home / 259,743.30-389,665.20-99,807.18

Finding the Fourth Proportional to 259,743.30, 389,665.20 and 99,807.18

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Solution

The fourth proportional to 259,743.30, 389,665.20 and 99,807.18 is: 149,730.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,743.30 : 389,665.20 = 99,807.18 : x
  2. Step 2: Convert to fraction form
    259,743.30/389,665.20 = 99,807.18/x
  3. Step 3: Cross multiply
    259,743.30x = 389,665.20 × 99,807.18
  4. Step 4: Simplify right side
    259,743.30x = 38,891,384,756.14
  5. Step 5: Solve for x
    x = 38,891,384,756.14/259,743.30
  6. Step 6: Final answer
    x = 149,730.08

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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.