Home / 258,345.59-387,309.27-80,761.19

Finding the Fourth Proportional to 258,345.59, 387,309.27 and 80,761.19

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Solution

The fourth proportional to 258,345.59, 387,309.27 and 80,761.19 is: 121,076.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,345.59 : 387,309.27 = 80,761.19 : x
  2. Step 2: Convert to fraction form
    258,345.59/387,309.27 = 80,761.19/x
  3. Step 3: Cross multiply
    258,345.59x = 387,309.27 × 80,761.19
  4. Step 4: Simplify right side
    258,345.59x = 31,279,557,543.23
  5. Step 5: Solve for x
    x = 31,279,557,543.23/258,345.59
  6. Step 6: Final answer
    x = 121,076.41

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1.5x scale

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.