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Finding the Fourth Proportional to 111,447.63, 153,795.06 and 61,718.54

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Solution

The fourth proportional to 111,447.63, 153,795.06 and 61,718.54 is: 85,170.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,447.63 : 153,795.06 = 61,718.54 : x
  2. Step 2: Convert to fraction form
    111,447.63/153,795.06 = 61,718.54/x
  3. Step 3: Cross multiply
    111,447.63x = 153,795.06 × 61,718.54
  4. Step 4: Simplify right side
    111,447.63x = 9,492,005,793.44
  5. Step 5: Solve for x
    x = 9,492,005,793.44/111,447.63
  6. Step 6: Final answer
    x = 85,170.10

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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.