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Finding the Fourth Proportional to 74,728.90, 102,915.93 and 73,095.94

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Solution

The fourth proportional to 74,728.90, 102,915.93 and 73,095.94 is: 100,667.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,728.90 : 102,915.93 = 73,095.94 : x
  2. Step 2: Convert to fraction form
    74,728.90/102,915.93 = 73,095.94/x
  3. Step 3: Cross multiply
    74,728.90x = 102,915.93 × 73,095.94
  4. Step 4: Simplify right side
    74,728.90x = 7,522,736,644.32
  5. Step 5: Solve for x
    x = 7,522,736,644.32/74,728.90
  6. Step 6: Final answer
    x = 100,667.03

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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.