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Finding the Fourth Proportional to 70,365.70, 105,554.09 and 20,446.66

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Solution

The fourth proportional to 70,365.70, 105,554.09 and 20,446.66 is: 30,671.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,365.70 : 105,554.09 = 20,446.66 : x
  2. Step 2: Convert to fraction form
    70,365.70/105,554.09 = 20,446.66/x
  3. Step 3: Cross multiply
    70,365.70x = 105,554.09 × 20,446.66
  4. Step 4: Simplify right side
    70,365.70x = 2,158,228,589.84
  5. Step 5: Solve for x
    x = 2,158,228,589.84/70,365.70
  6. Step 6: Final answer
    x = 30,671.60

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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.