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Finding the Fourth Proportional to 68,450.60, 102,740.70 and 42,206.60

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Solution

The fourth proportional to 68,450.60, 102,740.70 and 42,206.60 is: 63,349.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,450.60 : 102,740.70 = 42,206.60 : x
  2. Step 2: Convert to fraction form
    68,450.60/102,740.70 = 42,206.60/x
  3. Step 3: Cross multiply
    68,450.60x = 102,740.70 × 42,206.60
  4. Step 4: Simplify right side
    68,450.60x = 4,336,335,628.62
  5. Step 5: Solve for x
    x = 4,336,335,628.62/68,450.60
  6. Step 6: Final answer
    x = 63,349.86

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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.