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Finding the Fourth Proportional to 169,687.90, 254,587.21 and 80,929.87

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Solution

The fourth proportional to 169,687.90, 254,587.21 and 80,929.87 is: 121,421.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,687.90 : 254,587.21 = 80,929.87 : x
  2. Step 2: Convert to fraction form
    169,687.90/254,587.21 = 80,929.87/x
  3. Step 3: Cross multiply
    169,687.90x = 254,587.21 × 80,929.87
  4. Step 4: Simplify right side
    169,687.90x = 20,603,709,808.96
  5. Step 5: Solve for x
    x = 20,603,709,808.96/169,687.90
  6. Step 6: Final answer
    x = 121,421.21

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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.