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Finding the Fourth Proportional to 66,890.40, 100,384.20 and 27,475.80

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Solution

The fourth proportional to 66,890.40, 100,384.20 and 27,475.80 is: 41,233.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,890.40 : 100,384.20 = 27,475.80 : x
  2. Step 2: Convert to fraction form
    66,890.40/100,384.20 = 27,475.80/x
  3. Step 3: Cross multiply
    66,890.40x = 100,384.20 × 27,475.80
  4. Step 4: Simplify right side
    66,890.40x = 2,758,136,202.36
  5. Step 5: Solve for x
    x = 2,758,136,202.36/66,890.40
  6. Step 6: Final answer
    x = 41,233.66

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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.