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Finding the Fourth Proportional to 266,165.76, 399,311.58 and 86,250.90

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Solution

The fourth proportional to 266,165.76, 399,311.58 and 86,250.90 is: 129,396.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,165.76 : 399,311.58 = 86,250.90 : x
  2. Step 2: Convert to fraction form
    266,165.76/399,311.58 = 86,250.90/x
  3. Step 3: Cross multiply
    266,165.76x = 399,311.58 × 86,250.90
  4. Step 4: Simplify right side
    266,165.76x = 34,440,983,155.42
  5. Step 5: Solve for x
    x = 34,440,983,155.42/266,165.76
  6. Step 6: Final answer
    x = 129,396.75

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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.