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Finding the Fourth Proportional to 66,893.50, 100,389.12 and 53,902.72

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Solution

The fourth proportional to 66,893.50, 100,389.12 and 53,902.72 is: 80,893.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,893.50 : 100,389.12 = 53,902.72 : x
  2. Step 2: Convert to fraction form
    66,893.50/100,389.12 = 53,902.72/x
  3. Step 3: Cross multiply
    66,893.50x = 100,389.12 × 53,902.72
  4. Step 4: Simplify right side
    66,893.50x = 5,411,246,626.41
  5. Step 5: Solve for x
    x = 5,411,246,626.41/66,893.50
  6. Step 6: Final answer
    x = 80,893.46

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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.