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Finding the Fourth Proportional to 66,503.88, 99,772.26 and 19,756.68

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Solution

The fourth proportional to 66,503.88, 99,772.26 and 19,756.68 is: 29,639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,503.88 : 99,772.26 = 19,756.68 : x
  2. Step 2: Convert to fraction form
    66,503.88/99,772.26 = 19,756.68/x
  3. Step 3: Cross multiply
    66,503.88x = 99,772.26 × 19,756.68
  4. Step 4: Simplify right side
    66,503.88x = 1,971,168,613.70
  5. Step 5: Solve for x
    x = 1,971,168,613.70/66,503.88
  6. Step 6: Final answer
    x = 29,639.90

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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.