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Finding the Fourth Proportional to 156,744.14, 215,815.26 and 138,328.40

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Solution

The fourth proportional to 156,744.14, 215,815.26 and 138,328.40 is: 190,459.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,744.14 : 215,815.26 = 138,328.40 : x
  2. Step 2: Convert to fraction form
    156,744.14/215,815.26 = 138,328.40/x
  3. Step 3: Cross multiply
    156,744.14x = 215,815.26 × 138,328.40
  4. Step 4: Simplify right side
    156,744.14x = 29,853,379,611.38
  5. Step 5: Solve for x
    x = 29,853,379,611.38/156,744.14
  6. Step 6: Final answer
    x = 190,459.30

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.