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Finding the Fourth Proportional to 66,381.76, 99,572.64 and 19,630.99

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Solution

The fourth proportional to 66,381.76, 99,572.64 and 19,630.99 is: 29,446.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,381.76 : 99,572.64 = 19,630.99 : x
  2. Step 2: Convert to fraction form
    66,381.76/99,572.64 = 19,630.99/x
  3. Step 3: Cross multiply
    66,381.76x = 99,572.64 × 19,630.99
  4. Step 4: Simplify right side
    66,381.76x = 1,954,709,500.11
  5. Step 5: Solve for x
    x = 1,954,709,500.11/66,381.76
  6. Step 6: Final answer
    x = 29,446.49

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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.