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Finding the Fourth Proportional to 70,763.60, 106,231.80 and 70,245.20

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Solution

The fourth proportional to 70,763.60, 106,231.80 and 70,245.20 is: 105,453.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,763.60 : 106,231.80 = 70,245.20 : x
  2. Step 2: Convert to fraction form
    70,763.60/106,231.80 = 70,245.20/x
  3. Step 3: Cross multiply
    70,763.60x = 106,231.80 × 70,245.20
  4. Step 4: Simplify right side
    70,763.60x = 7,462,274,037.36
  5. Step 5: Solve for x
    x = 7,462,274,037.36/70,763.60
  6. Step 6: Final answer
    x = 105,453.57

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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.