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Finding the Fourth Proportional to 66,891.40, 100,385.70 and 27,476.80

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Solution

The fourth proportional to 66,891.40, 100,385.70 and 27,476.80 is: 41,235.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,891.40 : 100,385.70 = 27,476.80 : x
  2. Step 2: Convert to fraction form
    66,891.40/100,385.70 = 27,476.80/x
  3. Step 3: Cross multiply
    66,891.40x = 100,385.70 × 27,476.80
  4. Step 4: Simplify right side
    66,891.40x = 2,758,277,801.76
  5. Step 5: Solve for x
    x = 2,758,277,801.76/66,891.40
  6. Step 6: Final answer
    x = 41,235.16

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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.