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Finding the Fourth Proportional to 70,455.74, 105,729.42 and 30,513.73

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Solution

The fourth proportional to 70,455.74, 105,729.42 and 30,513.73 is: 45,790.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,455.74 : 105,729.42 = 30,513.73 : x
  2. Step 2: Convert to fraction form
    70,455.74/105,729.42 = 30,513.73/x
  3. Step 3: Cross multiply
    70,455.74x = 105,729.42 × 30,513.73
  4. Step 4: Simplify right side
    70,455.74x = 3,226,198,446.29
  5. Step 5: Solve for x
    x = 3,226,198,446.29/70,455.74
  6. Step 6: Final answer
    x = 45,790.43

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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.