Home / 259,649.12-389,434.71-82,133.06

Finding the Fourth Proportional to 259,649.12, 389,434.71 and 82,133.06

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Solution

The fourth proportional to 259,649.12, 389,434.71 and 82,133.06 is: 123,187.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,649.12 : 389,434.71 = 82,133.06 : x
  2. Step 2: Convert to fraction form
    259,649.12/389,434.71 = 82,133.06/x
  3. Step 3: Cross multiply
    259,649.12x = 389,434.71 × 82,133.06
  4. Step 4: Simplify right side
    259,649.12x = 31,985,462,455.34
  5. Step 5: Solve for x
    x = 31,985,462,455.34/259,649.12
  6. Step 6: Final answer
    x = 123,187.26

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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.