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Finding the Fourth Proportional to 112,791.42, 155,652.19 and 61,803.73

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Solution

The fourth proportional to 112,791.42, 155,652.19 and 61,803.73 is: 85,289.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,791.42 : 155,652.19 = 61,803.73 : x
  2. Step 2: Convert to fraction form
    112,791.42/155,652.19 = 61,803.73/x
  3. Step 3: Cross multiply
    112,791.42x = 155,652.19 × 61,803.73
  4. Step 4: Simplify right side
    112,791.42x = 9,619,885,924.67
  5. Step 5: Solve for x
    x = 9,619,885,924.67/112,791.42
  6. Step 6: Final answer
    x = 85,289.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.