Home / 258,577.48-387,868.38-81,111.88

Finding the Fourth Proportional to 258,577.48, 387,868.38 and 81,111.88

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Solution

The fourth proportional to 258,577.48, 387,868.38 and 81,111.88 is: 121,668.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,577.48 : 387,868.38 = 81,111.88 : x
  2. Step 2: Convert to fraction form
    258,577.48/387,868.38 = 81,111.88/x
  3. Step 3: Cross multiply
    258,577.48x = 387,868.38 × 81,111.88
  4. Step 4: Simplify right side
    258,577.48x = 31,460,733,494.35
  5. Step 5: Solve for x
    x = 31,460,733,494.35/258,577.48
  6. Step 6: Final answer
    x = 121,668.50

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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.