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Finding the Fourth Proportional to 72,136.41, 108,696.99 and 59,276.85

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Solution

The fourth proportional to 72,136.41, 108,696.99 and 59,276.85 is: 89,319.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,136.41 : 108,696.99 = 59,276.85 : x
  2. Step 2: Convert to fraction form
    72,136.41/108,696.99 = 59,276.85/x
  3. Step 3: Cross multiply
    72,136.41x = 108,696.99 × 59,276.85
  4. Step 4: Simplify right side
    72,136.41x = 6,443,214,776.39
  5. Step 5: Solve for x
    x = 6,443,214,776.39/72,136.41
  6. Step 6: Final answer
    x = 89,319.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.