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Finding the Fourth Proportional to 91,636.16, 137,220.90 and 60,376.64

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Solution

The fourth proportional to 91,636.16, 137,220.90 and 60,376.64 is: 90,411.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,636.16 : 137,220.90 = 60,376.64 : x
  2. Step 2: Convert to fraction form
    91,636.16/137,220.90 = 60,376.64/x
  3. Step 3: Cross multiply
    91,636.16x = 137,220.90 × 60,376.64
  4. Step 4: Simplify right side
    91,636.16x = 8,284,936,879.78
  5. Step 5: Solve for x
    x = 8,284,936,879.78/91,636.16
  6. Step 6: Final answer
    x = 90,411.22

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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.