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Finding the Fourth Proportional to 68,792.12, 102,717.40 and 61,630.20

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Solution

The fourth proportional to 68,792.12, 102,717.40 and 61,630.20 is: 92,023.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,792.12 : 102,717.40 = 61,630.20 : x
  2. Step 2: Convert to fraction form
    68,792.12/102,717.40 = 61,630.20/x
  3. Step 3: Cross multiply
    68,792.12x = 102,717.40 × 61,630.20
  4. Step 4: Simplify right side
    68,792.12x = 6,330,493,905.48
  5. Step 5: Solve for x
    x = 6,330,493,905.48/68,792.12
  6. Step 6: Final answer
    x = 92,023.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.