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Finding the Fourth Proportional to 171,637.61, 257,121.23 and 81,552.11

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Solution

The fourth proportional to 171,637.61, 257,121.23 and 81,552.11 is: 122,168.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,637.61 : 257,121.23 = 81,552.11 : x
  2. Step 2: Convert to fraction form
    171,637.61/257,121.23 = 81,552.11/x
  3. Step 3: Cross multiply
    171,637.61x = 257,121.23 × 81,552.11
  4. Step 4: Simplify right side
    171,637.61x = 20,968,777,138.93
  5. Step 5: Solve for x
    x = 20,968,777,138.93/171,637.61
  6. Step 6: Final answer
    x = 122,168.90

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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.