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Finding the Fourth Proportional to 58,687.83, 80,989.08 and 31,830.20

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Solution

The fourth proportional to 58,687.83, 80,989.08 and 31,830.20 is: 43,925.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,687.83 : 80,989.08 = 31,830.20 : x
  2. Step 2: Convert to fraction form
    58,687.83/80,989.08 = 31,830.20/x
  3. Step 3: Cross multiply
    58,687.83x = 80,989.08 × 31,830.20
  4. Step 4: Simplify right side
    58,687.83x = 2,577,898,614.22
  5. Step 5: Solve for x
    x = 2,577,898,614.22/58,687.83
  6. Step 6: Final answer
    x = 43,925.61

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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.