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Finding the Fourth Proportional to 169,939.54, 254,521.54 and 81,255.77

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Solution

The fourth proportional to 169,939.54, 254,521.54 and 81,255.77 is: 121,698.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,939.54 : 254,521.54 = 81,255.77 : x
  2. Step 2: Convert to fraction form
    169,939.54/254,521.54 = 81,255.77/x
  3. Step 3: Cross multiply
    169,939.54x = 254,521.54 × 81,255.77
  4. Step 4: Simplify right side
    169,939.54x = 20,681,343,714.29
  5. Step 5: Solve for x
    x = 20,681,343,714.29/169,939.54
  6. Step 6: Final answer
    x = 121,698.24

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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.