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Finding the Fourth Proportional to 58,990.64, 81,486.72 and 47,137.16

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Solution

The fourth proportional to 58,990.64, 81,486.72 and 47,137.16 is: 65,112.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,990.64 : 81,486.72 = 47,137.16 : x
  2. Step 2: Convert to fraction form
    58,990.64/81,486.72 = 47,137.16/x
  3. Step 3: Cross multiply
    58,990.64x = 81,486.72 × 47,137.16
  4. Step 4: Simplify right side
    58,990.64x = 3,841,052,558.52
  5. Step 5: Solve for x
    x = 3,841,052,558.52/58,990.64
  6. Step 6: Final answer
    x = 65,112.92

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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.