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Finding the Fourth Proportional to 58,471.64, 80,690.70 and 31,613.96

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Solution

The fourth proportional to 58,471.64, 80,690.70 and 31,613.96 is: 43,627.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,471.64 : 80,690.70 = 31,613.96 : x
  2. Step 2: Convert to fraction form
    58,471.64/80,690.70 = 31,613.96/x
  3. Step 3: Cross multiply
    58,471.64x = 80,690.70 × 31,613.96
  4. Step 4: Simplify right side
    58,471.64x = 2,550,952,562.17
  5. Step 5: Solve for x
    x = 2,550,952,562.17/58,471.64
  6. Step 6: Final answer
    x = 43,627.18

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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.