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Finding the Fourth Proportional to 266,768.10, 400,115.70 and 79,779.60

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Solution

The fourth proportional to 266,768.10, 400,115.70 and 79,779.60 is: 119,658.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,768.10 : 400,115.70 = 79,779.60 : x
  2. Step 2: Convert to fraction form
    266,768.10/400,115.70 = 79,779.60/x
  3. Step 3: Cross multiply
    266,768.10x = 400,115.70 × 79,779.60
  4. Step 4: Simplify right side
    266,768.10x = 31,921,070,499.72
  5. Step 5: Solve for x
    x = 31,921,070,499.72/266,768.10
  6. Step 6: Final answer
    x = 119,658.50

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1.5x scale

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.