Home / 258,576.98-387,867.63-81,111.38

Finding the Fourth Proportional to 258,576.98, 387,867.63 and 81,111.38

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Solution

The fourth proportional to 258,576.98, 387,867.63 and 81,111.38 is: 121,667.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,576.98 : 387,867.63 = 81,111.38 : x
  2. Step 2: Convert to fraction form
    258,576.98/387,867.63 = 81,111.38/x
  3. Step 3: Cross multiply
    258,576.98x = 387,867.63 × 81,111.38
  4. Step 4: Simplify right side
    258,576.98x = 31,460,478,726.63
  5. Step 5: Solve for x
    x = 31,460,478,726.63/258,576.98
  6. Step 6: Final answer
    x = 121,667.75

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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.