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Finding the Fourth Proportional to 68,688.48, 102,974.16 and 66,705.60

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Solution

The fourth proportional to 68,688.48, 102,974.16 and 66,705.60 is: 100,001.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,688.48 : 102,974.16 = 66,705.60 : x
  2. Step 2: Convert to fraction form
    68,688.48/102,974.16 = 66,705.60/x
  3. Step 3: Cross multiply
    68,688.48x = 102,974.16 × 66,705.60
  4. Step 4: Simplify right side
    68,688.48x = 6,868,953,127.30
  5. Step 5: Solve for x
    x = 6,868,953,127.30/68,688.48
  6. Step 6: Final answer
    x = 100,001.53

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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.