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Finding the Fourth Proportional to 70,591.41, 105,914.66 and 31,120.79

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Solution

The fourth proportional to 70,591.41, 105,914.66 and 31,120.79 is: 46,693.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,591.41 : 105,914.66 = 31,120.79 : x
  2. Step 2: Convert to fraction form
    70,591.41/105,914.66 = 31,120.79/x
  3. Step 3: Cross multiply
    70,591.41x = 105,914.66 × 31,120.79
  4. Step 4: Simplify right side
    70,591.41x = 3,296,147,206.60
  5. Step 5: Solve for x
    x = 3,296,147,206.60/70,591.41
  6. Step 6: Final answer
    x = 46,693.32

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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.