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Finding the Fourth Proportional to 124,978.08, 187,231.72 and 61,724.16

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Solution

The fourth proportional to 124,978.08, 187,231.72 and 61,724.16 is: 92,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,978.08 : 187,231.72 = 61,724.16 : x
  2. Step 2: Convert to fraction form
    124,978.08/187,231.72 = 61,724.16/x
  3. Step 3: Cross multiply
    124,978.08x = 187,231.72 × 61,724.16
  4. Step 4: Simplify right side
    124,978.08x = 11,556,720,642.36
  5. Step 5: Solve for x
    x = 11,556,720,642.36/124,978.08
  6. Step 6: Final answer
    x = 92,469.98

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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.