Home / 258,061.31-387,091.96-80,583.53

Finding the Fourth Proportional to 258,061.31, 387,091.96 and 80,583.53

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Solution

The fourth proportional to 258,061.31, 387,091.96 and 80,583.53 is: 120,875.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,061.31 : 387,091.96 = 80,583.53 : x
  2. Step 2: Convert to fraction form
    258,061.31/387,091.96 = 80,583.53/x
  3. Step 3: Cross multiply
    258,061.31x = 387,091.96 × 80,583.53
  4. Step 4: Simplify right side
    258,061.31x = 31,193,234,887.78
  5. Step 5: Solve for x
    x = 31,193,234,887.78/258,061.31
  6. Step 6: Final answer
    x = 120,875.29

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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.