Home / 258,478.11-387,717.30-80,999.01

Finding the Fourth Proportional to 258,478.11, 387,717.30 and 80,999.01

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Solution

The fourth proportional to 258,478.11, 387,717.30 and 80,999.01 is: 121,498.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,478.11 : 387,717.30 = 80,999.01 : x
  2. Step 2: Convert to fraction form
    258,478.11/387,717.30 = 80,999.01/x
  3. Step 3: Cross multiply
    258,478.11x = 387,717.30 × 80,999.01
  4. Step 4: Simplify right side
    258,478.11x = 31,404,717,459.87
  5. Step 5: Solve for x
    x = 31,404,717,459.87/258,478.11
  6. Step 6: Final answer
    x = 121,498.56

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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.