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Finding the Fourth Proportional to 86,472, 119,331.36 and 46,728

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Solution

The fourth proportional to 86,472, 119,331.36 and 46,728 is: 64,484.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,472 : 119,331.36 = 46,728 : x
  2. Step 2: Convert to fraction form
    86,472/119,331.36 = 46,728/x
  3. Step 3: Cross multiply
    86,472x = 119,331.36 × 46,728
  4. Step 4: Simplify right side
    86,472x = 5,576,115,790.08
  5. Step 5: Solve for x
    x = 5,576,115,790.08/86,472
  6. Step 6: Final answer
    x = 64,484.64

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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.