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Finding the Fourth Proportional to 258,474.83, 387,712.37 and 80,995.73

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Solution

The fourth proportional to 258,474.83, 387,712.37 and 80,995.73 is: 121,493.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,474.83 : 387,712.37 = 80,995.73 : x
  2. Step 2: Convert to fraction form
    258,474.83/387,712.37 = 80,995.73/x
  3. Step 3: Cross multiply
    258,474.83x = 387,712.37 × 80,995.73
  4. Step 4: Simplify right side
    258,474.83x = 31,403,044,702.11
  5. Step 5: Solve for x
    x = 31,403,044,702.11/258,474.83
  6. Step 6: Final answer
    x = 121,493.63

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Double scale
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Similar ratio
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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.