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Finding the Fourth Proportional to 81,163.61, 112,003.63 and 45,353.91

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Solution

The fourth proportional to 81,163.61, 112,003.63 and 45,353.91 is: 62,587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,163.61 : 112,003.63 = 45,353.91 : x
  2. Step 2: Convert to fraction form
    81,163.61/112,003.63 = 45,353.91/x
  3. Step 3: Cross multiply
    81,163.61x = 112,003.63 × 45,353.91
  4. Step 4: Simplify right side
    81,163.61x = 5,079,802,721.32
  5. Step 5: Solve for x
    x = 5,079,802,721.32/81,163.61
  6. Step 6: Final answer
    x = 62,587.20

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1.5x scale

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.