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Finding the Fourth Proportional to 91,328.25, 137,033.42 and 58,039.68

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Solution

The fourth proportional to 91,328.25, 137,033.42 and 58,039.68 is: 87,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,328.25 : 137,033.42 = 58,039.68 : x
  2. Step 2: Convert to fraction form
    91,328.25/137,033.42 = 58,039.68/x
  3. Step 3: Cross multiply
    91,328.25x = 137,033.42 × 58,039.68
  4. Step 4: Simplify right side
    91,328.25x = 7,953,375,555.91
  5. Step 5: Solve for x
    x = 7,953,375,555.91/91,328.25
  6. Step 6: Final answer
    x = 87,085.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.