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Finding the Fourth Proportional to 262,189.80, 393,381.90 and 104,531.40

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Solution

The fourth proportional to 262,189.80, 393,381.90 and 104,531.40 is: 156,835.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,189.80 : 393,381.90 = 104,531.40 : x
  2. Step 2: Convert to fraction form
    262,189.80/393,381.90 = 104,531.40/x
  3. Step 3: Cross multiply
    262,189.80x = 393,381.90 × 104,531.40
  4. Step 4: Simplify right side
    262,189.80x = 41,120,760,741.66
  5. Step 5: Solve for x
    x = 41,120,760,741.66/262,189.80
  6. Step 6: Final answer
    x = 156,835.85

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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.