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Finding the Fourth Proportional to 266,761.61, 399,994.75 and 109,100.78

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Solution

The fourth proportional to 266,761.61, 399,994.75 and 109,100.78 is: 163,590.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,761.61 : 399,994.75 = 109,100.78 : x
  2. Step 2: Convert to fraction form
    266,761.61/399,994.75 = 109,100.78/x
  3. Step 3: Cross multiply
    266,761.61x = 399,994.75 × 109,100.78
  4. Step 4: Simplify right side
    266,761.61x = 43,639,739,220.91
  5. Step 5: Solve for x
    x = 43,639,739,220.91/266,761.61
  6. Step 6: Final answer
    x = 163,590.78

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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.