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Finding the Fourth Proportional to 266,808.21, 400,182.72 and 67,128.63

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Solution

The fourth proportional to 266,808.21, 400,182.72 and 67,128.63 is: 100,685.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,808.21 : 400,182.72 = 67,128.63 : x
  2. Step 2: Convert to fraction form
    266,808.21/400,182.72 = 67,128.63/x
  3. Step 3: Cross multiply
    266,808.21x = 400,182.72 × 67,128.63
  4. Step 4: Simplify right side
    266,808.21x = 26,863,717,743.27
  5. Step 5: Solve for x
    x = 26,863,717,743.27/266,808.21
  6. Step 6: Final answer
    x = 100,685.50

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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.