Home / 259,070.13-388,619.07-81,590.97

Finding the Fourth Proportional to 259,070.13, 388,619.07 and 81,590.97

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Solution

The fourth proportional to 259,070.13, 388,619.07 and 81,590.97 is: 122,390.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,070.13 : 388,619.07 = 81,590.97 : x
  2. Step 2: Convert to fraction form
    259,070.13/388,619.07 = 81,590.97/x
  3. Step 3: Cross multiply
    259,070.13x = 388,619.07 × 81,590.97
  4. Step 4: Simplify right side
    259,070.13x = 31,707,806,881.80
  5. Step 5: Solve for x
    x = 31,707,806,881.80/259,070.13
  6. Step 6: Final answer
    x = 122,390.82

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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.