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Finding the Fourth Proportional to 66,151.10, 99,192.63 and 19,397.90

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Solution

The fourth proportional to 66,151.10, 99,192.63 and 19,397.90 is: 29,086.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,151.10 : 99,192.63 = 19,397.90 : x
  2. Step 2: Convert to fraction form
    66,151.10/99,192.63 = 19,397.90/x
  3. Step 3: Cross multiply
    66,151.10x = 99,192.63 × 19,397.90
  4. Step 4: Simplify right side
    66,151.10x = 1,924,128,717.48
  5. Step 5: Solve for x
    x = 1,924,128,717.48/66,151.10
  6. Step 6: Final answer
    x = 29,086.87

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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.