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Finding the Fourth Proportional to 266,235.81, 399,153.02 and 138,014.13

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Solution

The fourth proportional to 266,235.81, 399,153.02 and 138,014.13 is: 206,917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,235.81 : 399,153.02 = 138,014.13 : x
  2. Step 2: Convert to fraction form
    266,235.81/399,153.02 = 138,014.13/x
  3. Step 3: Cross multiply
    266,235.81x = 399,153.02 × 138,014.13
  4. Step 4: Simplify right side
    266,235.81x = 55,088,755,353.69
  5. Step 5: Solve for x
    x = 55,088,755,353.69/266,235.81
  6. Step 6: Final answer
    x = 206,917.15

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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.