Home / 258,653.38-387,996.47-81,167.39

Finding the Fourth Proportional to 258,653.38, 387,996.47 and 81,167.39

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Solution

The fourth proportional to 258,653.38, 387,996.47 and 81,167.39 is: 121,756.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,653.38 : 387,996.47 = 81,167.39 : x
  2. Step 2: Convert to fraction form
    258,653.38/387,996.47 = 81,167.39/x
  3. Step 3: Cross multiply
    258,653.38x = 387,996.47 × 81,167.39
  4. Step 4: Simplify right side
    258,653.38x = 31,492,660,799.11
  5. Step 5: Solve for x
    x = 31,492,660,799.11/258,653.38
  6. Step 6: Final answer
    x = 121,756.23

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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.