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Finding the Fourth Proportional to 66,100.71, 99,136.47 and 19,357.23

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Solution

The fourth proportional to 66,100.71, 99,136.47 and 19,357.23 is: 29,031.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,100.71 : 99,136.47 = 19,357.23 : x
  2. Step 2: Convert to fraction form
    66,100.71/99,136.47 = 19,357.23/x
  3. Step 3: Cross multiply
    66,100.71x = 99,136.47 × 19,357.23
  4. Step 4: Simplify right side
    66,100.71x = 1,919,007,451.18
  5. Step 5: Solve for x
    x = 1,919,007,451.18/66,100.71
  6. Step 6: Final answer
    x = 29,031.57

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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.