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Finding the Fourth Proportional to 161,686.80, 242,530.20 and 127,861.20

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Solution

The fourth proportional to 161,686.80, 242,530.20 and 127,861.20 is: 191,791.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,686.80 : 242,530.20 = 127,861.20 : x
  2. Step 2: Convert to fraction form
    161,686.80/242,530.20 = 127,861.20/x
  3. Step 3: Cross multiply
    161,686.80x = 242,530.20 × 127,861.20
  4. Step 4: Simplify right side
    161,686.80x = 31,010,202,408.24
  5. Step 5: Solve for x
    x = 31,010,202,408.24/161,686.80
  6. Step 6: Final answer
    x = 191,791.80

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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.