Home / 258,356.09-387,325.02-80,771.69

Finding the Fourth Proportional to 258,356.09, 387,325.02 and 80,771.69

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Solution

The fourth proportional to 258,356.09, 387,325.02 and 80,771.69 is: 121,092.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,356.09 : 387,325.02 = 80,771.69 : x
  2. Step 2: Convert to fraction form
    258,356.09/387,325.02 = 80,771.69/x
  3. Step 3: Cross multiply
    258,356.09x = 387,325.02 × 80,771.69
  4. Step 4: Simplify right side
    258,356.09x = 31,284,896,444.68
  5. Step 5: Solve for x
    x = 31,284,896,444.68/258,356.09
  6. Step 6: Final answer
    x = 121,092.16

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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.