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Finding the Fourth Proportional to 75,136.16, 103,680.72 and 44,915.48

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Solution

The fourth proportional to 75,136.16, 103,680.72 and 44,915.48 is: 61,979.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,136.16 : 103,680.72 = 44,915.48 : x
  2. Step 2: Convert to fraction form
    75,136.16/103,680.72 = 44,915.48/x
  3. Step 3: Cross multiply
    75,136.16x = 103,680.72 × 44,915.48
  4. Step 4: Simplify right side
    75,136.16x = 4,656,869,305.55
  5. Step 5: Solve for x
    x = 4,656,869,305.55/75,136.16
  6. Step 6: Final answer
    x = 61,979.07

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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.