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Finding the Fourth Proportional to 68,280.72, 102,263.72 and 65,916.62

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Solution

The fourth proportional to 68,280.72, 102,263.72 and 65,916.62 is: 98,723.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,280.72 : 102,263.72 = 65,916.62 : x
  2. Step 2: Convert to fraction form
    68,280.72/102,263.72 = 65,916.62/x
  3. Step 3: Cross multiply
    68,280.72x = 102,263.72 × 65,916.62
  4. Step 4: Simplify right side
    68,280.72x = 6,740,878,771.03
  5. Step 5: Solve for x
    x = 6,740,878,771.03/68,280.72
  6. Step 6: Final answer
    x = 98,723.02

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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.