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Finding the Fourth Proportional to 68,035.20, 102,045.60 and 21,285.60

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Solution

The fourth proportional to 68,035.20, 102,045.60 and 21,285.60 is: 31,926.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,035.20 : 102,045.60 = 21,285.60 : x
  2. Step 2: Convert to fraction form
    68,035.20/102,045.60 = 21,285.60/x
  3. Step 3: Cross multiply
    68,035.20x = 102,045.60 × 21,285.60
  4. Step 4: Simplify right side
    68,035.20x = 2,172,101,823.36
  5. Step 5: Solve for x
    x = 2,172,101,823.36/68,035.20
  6. Step 6: Final answer
    x = 31,926.15

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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.