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Finding the Fourth Proportional to 172,278.09, 258,417.54 and 53,959.77

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Solution

The fourth proportional to 172,278.09, 258,417.54 and 53,959.77 is: 80,939.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,278.09 : 258,417.54 = 53,959.77 : x
  2. Step 2: Convert to fraction form
    172,278.09/258,417.54 = 53,959.77/x
  3. Step 3: Cross multiply
    172,278.09x = 258,417.54 × 53,959.77
  4. Step 4: Simplify right side
    172,278.09x = 13,944,151,022.37
  5. Step 5: Solve for x
    x = 13,944,151,022.37/172,278.09
  6. Step 6: Final answer
    x = 80,939.78

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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.