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Finding the Fourth Proportional to 61,318.91, 91,989.77 and 21,336.23

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Solution

The fourth proportional to 61,318.91, 91,989.77 and 21,336.23 is: 32,008.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,318.91 : 91,989.77 = 21,336.23 : x
  2. Step 2: Convert to fraction form
    61,318.91/91,989.77 = 21,336.23/x
  3. Step 3: Cross multiply
    61,318.91x = 91,989.77 × 21,336.23
  4. Step 4: Simplify right side
    61,318.91x = 1,962,714,323.74
  5. Step 5: Solve for x
    x = 1,962,714,323.74/61,318.91
  6. Step 6: Final answer
    x = 32,008.31

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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.