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Finding the Fourth Proportional to 58,478.52, 80,700.18 and 31,620.95

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Solution

The fourth proportional to 58,478.52, 80,700.18 and 31,620.95 is: 43,636.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,478.52 : 80,700.18 = 31,620.95 : x
  2. Step 2: Convert to fraction form
    58,478.52/80,700.18 = 31,620.95/x
  3. Step 3: Cross multiply
    58,478.52x = 80,700.18 × 31,620.95
  4. Step 4: Simplify right side
    58,478.52x = 2,551,815,953.27
  5. Step 5: Solve for x
    x = 2,551,815,953.27/58,478.52
  6. Step 6: Final answer
    x = 43,636.81

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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.