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Finding the Fourth Proportional to 68,435.70, 102,653.55 and 60,659.70

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Solution

The fourth proportional to 68,435.70, 102,653.55 and 60,659.70 is: 90,989.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,435.70 : 102,653.55 = 60,659.70 : x
  2. Step 2: Convert to fraction form
    68,435.70/102,653.55 = 60,659.70/x
  3. Step 3: Cross multiply
    68,435.70x = 102,653.55 × 60,659.70
  4. Step 4: Simplify right side
    68,435.70x = 6,226,933,546.94
  5. Step 5: Solve for x
    x = 6,226,933,546.94/68,435.70
  6. Step 6: Final answer
    x = 90,989.55

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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.