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Finding the Fourth Proportional to 70,063.87, 105,137.32 and 65,630.84

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Solution

The fourth proportional to 70,063.87, 105,137.32 and 65,630.84 is: 98,485.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,063.87 : 105,137.32 = 65,630.84 : x
  2. Step 2: Convert to fraction form
    70,063.87/105,137.32 = 65,630.84/x
  3. Step 3: Cross multiply
    70,063.87x = 105,137.32 × 65,630.84
  4. Step 4: Simplify right side
    70,063.87x = 6,900,250,791.03
  5. Step 5: Solve for x
    x = 6,900,250,791.03/70,063.87
  6. Step 6: Final answer
    x = 98,485.15

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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.