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Finding the Fourth Proportional to 58,980, 81,390.76 and 32,121.92

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Solution

The fourth proportional to 58,980, 81,390.76 and 32,121.92 is: 44,327.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,980 : 81,390.76 = 32,121.92 : x
  2. Step 2: Convert to fraction form
    58,980/81,390.76 = 32,121.92/x
  3. Step 3: Cross multiply
    58,980x = 81,390.76 × 32,121.92
  4. Step 4: Simplify right side
    58,980x = 2,614,427,481.46
  5. Step 5: Solve for x
    x = 2,614,427,481.46/58,980
  6. Step 6: Final answer
    x = 44,327.36

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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.