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Finding the Fourth Proportional to 90,937.99, 136,361.31 and 52,999.48

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Solution

The fourth proportional to 90,937.99, 136,361.31 and 52,999.48 is: 79,472.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,937.99 : 136,361.31 = 52,999.48 : x
  2. Step 2: Convert to fraction form
    90,937.99/136,361.31 = 52,999.48/x
  3. Step 3: Cross multiply
    90,937.99x = 136,361.31 × 52,999.48
  4. Step 4: Simplify right side
    90,937.99x = 7,227,078,522.12
  5. Step 5: Solve for x
    x = 7,227,078,522.12/90,937.99
  6. Step 6: Final answer
    x = 79,472.60

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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.