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Finding the Fourth Proportional to 62,510.92, 86,305.32 and 55,785

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Solution

The fourth proportional to 62,510.92, 86,305.32 and 55,785 is: 77,019.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,510.92 : 86,305.32 = 55,785 : x
  2. Step 2: Convert to fraction form
    62,510.92/86,305.32 = 55,785/x
  3. Step 3: Cross multiply
    62,510.92x = 86,305.32 × 55,785
  4. Step 4: Simplify right side
    62,510.92x = 4,814,542,276.20
  5. Step 5: Solve for x
    x = 4,814,542,276.20/62,510.92
  6. Step 6: Final answer
    x = 77,019.22

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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.