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Finding the Fourth Proportional to 266,595.20, 399,741.60 and 108,638.72

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Solution

The fourth proportional to 266,595.20, 399,741.60 and 108,638.72 is: 162,896.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,595.20 : 399,741.60 = 108,638.72 : x
  2. Step 2: Convert to fraction form
    266,595.20/399,741.60 = 108,638.72/x
  3. Step 3: Cross multiply
    266,595.20x = 399,741.60 × 108,638.72
  4. Step 4: Simplify right side
    266,595.20x = 43,427,415,754.75
  5. Step 5: Solve for x
    x = 43,427,415,754.75/266,595.20
  6. Step 6: Final answer
    x = 162,896.47

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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.