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Finding the Fourth Proportional to 68,003.70, 102,005.55 and 40,355.70

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Solution

The fourth proportional to 68,003.70, 102,005.55 and 40,355.70 is: 60,533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,003.70 : 102,005.55 = 40,355.70 : x
  2. Step 2: Convert to fraction form
    68,003.70/102,005.55 = 40,355.70/x
  3. Step 3: Cross multiply
    68,003.70x = 102,005.55 × 40,355.70
  4. Step 4: Simplify right side
    68,003.70x = 4,116,505,374.14
  5. Step 5: Solve for x
    x = 4,116,505,374.14/68,003.70
  6. Step 6: Final answer
    x = 60,533.55

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1.5x scale

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.