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Finding the Fourth Proportional to 171,559.56, 257,054.79 and 121,390.98

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Solution

The fourth proportional to 171,559.56, 257,054.79 and 121,390.98 is: 181,885.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,559.56 : 257,054.79 = 121,390.98 : x
  2. Step 2: Convert to fraction form
    171,559.56/257,054.79 = 121,390.98/x
  3. Step 3: Cross multiply
    171,559.56x = 257,054.79 × 121,390.98
  4. Step 4: Simplify right side
    171,559.56x = 31,204,132,871.79
  5. Step 5: Solve for x
    x = 31,204,132,871.79/171,559.56
  6. Step 6: Final answer
    x = 181,885.13

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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.