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Finding the Fourth Proportional to 172,081.80, 258,122.70 and 161,713.80

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Solution

The fourth proportional to 172,081.80, 258,122.70 and 161,713.80 is: 242,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,081.80 : 258,122.70 = 161,713.80 : x
  2. Step 2: Convert to fraction form
    172,081.80/258,122.70 = 161,713.80/x
  3. Step 3: Cross multiply
    172,081.80x = 258,122.70 × 161,713.80
  4. Step 4: Simplify right side
    172,081.80x = 41,742,002,683.26
  5. Step 5: Solve for x
    x = 41,742,002,683.26/172,081.80
  6. Step 6: Final answer
    x = 242,570.70

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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.