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Finding the Fourth Proportional to 58,661.72, 87,943.14 and 39,889.16

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Solution

The fourth proportional to 58,661.72, 87,943.14 and 39,889.16 is: 59,800.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,661.72 : 87,943.14 = 39,889.16 : x
  2. Step 2: Convert to fraction form
    58,661.72/87,943.14 = 39,889.16/x
  3. Step 3: Cross multiply
    58,661.72x = 87,943.14 × 39,889.16
  4. Step 4: Simplify right side
    58,661.72x = 3,507,977,982.36
  5. Step 5: Solve for x
    x = 3,507,977,982.36/58,661.72
  6. Step 6: Final answer
    x = 59,800.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.