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Finding the Fourth Proportional to 70,353.60, 105,616.80 and 69,835.20

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Solution

The fourth proportional to 70,353.60, 105,616.80 and 69,835.20 is: 104,838.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,353.60 : 105,616.80 = 69,835.20 : x
  2. Step 2: Convert to fraction form
    70,353.60/105,616.80 = 69,835.20/x
  3. Step 3: Cross multiply
    70,353.60x = 105,616.80 × 69,835.20
  4. Step 4: Simplify right side
    70,353.60x = 7,375,770,351.36
  5. Step 5: Solve for x
    x = 7,375,770,351.36/70,353.60
  6. Step 6: Final answer
    x = 104,838.56

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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.