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Finding the Fourth Proportional to 70,560.85, 105,857.41 and 30,586.52

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Solution

The fourth proportional to 70,560.85, 105,857.41 and 30,586.52 is: 45,886.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,560.85 : 105,857.41 = 30,586.52 : x
  2. Step 2: Convert to fraction form
    70,560.85/105,857.41 = 30,586.52/x
  3. Step 3: Cross multiply
    70,560.85x = 105,857.41 × 30,586.52
  4. Step 4: Simplify right side
    70,560.85x = 3,237,809,788.11
  5. Step 5: Solve for x
    x = 3,237,809,788.11/70,560.85
  6. Step 6: Final answer
    x = 45,886.78

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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.