Home / 258,615.06-387,937.17-81,118.14

Finding the Fourth Proportional to 258,615.06, 387,937.17 and 81,118.14

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Solution

The fourth proportional to 258,615.06, 387,937.17 and 81,118.14 is: 121,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,615.06 : 387,937.17 = 81,118.14 : x
  2. Step 2: Convert to fraction form
    258,615.06/387,937.17 = 81,118.14/x
  3. Step 3: Cross multiply
    258,615.06x = 387,937.17 × 81,118.14
  4. Step 4: Simplify right side
    258,615.06x = 31,468,741,667.26
  5. Step 5: Solve for x
    x = 31,468,741,667.26/258,615.06
  6. Step 6: Final answer
    x = 121,681.78

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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.