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Finding the Fourth Proportional to 258,185.80, 387,279 and 80,693.74

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Solution

The fourth proportional to 258,185.80, 387,279 and 80,693.74 is: 121,040.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,185.80 : 387,279 = 80,693.74 : x
  2. Step 2: Convert to fraction form
    258,185.80/387,279 = 80,693.74/x
  3. Step 3: Cross multiply
    258,185.80x = 387,279 × 80,693.74
  4. Step 4: Simplify right side
    258,185.80x = 31,250,990,933.46
  5. Step 5: Solve for x
    x = 31,250,990,933.46/258,185.80
  6. Step 6: Final answer
    x = 121,040.70

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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.