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Finding the Fourth Proportional to 171,560.31, 257,055.90 and 121,391.73

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Solution

The fourth proportional to 171,560.31, 257,055.90 and 121,391.73 is: 181,886.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,560.31 : 257,055.90 = 121,391.73 : x
  2. Step 2: Convert to fraction form
    171,560.31/257,055.90 = 121,391.73/x
  3. Step 3: Cross multiply
    171,560.31x = 257,055.90 × 121,391.73
  4. Step 4: Simplify right side
    171,560.31x = 31,204,460,407.71
  5. Step 5: Solve for x
    x = 31,204,460,407.71/171,560.31
  6. Step 6: Final answer
    x = 181,886.24

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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.