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Finding the Fourth Proportional to 81,231.40, 113,840.60 and 81,231.40

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Solution

The fourth proportional to 81,231.40, 113,840.60 and 81,231.40 is: 113,840.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.40 : 113,840.60 = 81,231.40 : x
  2. Step 2: Convert to fraction form
    81,231.40/113,840.60 = 81,231.40/x
  3. Step 3: Cross multiply
    81,231.40x = 113,840.60 × 81,231.40
  4. Step 4: Simplify right side
    81,231.40x = 9,247,431,314.84
  5. Step 5: Solve for x
    x = 9,247,431,314.84/81,231.40
  6. Step 6: Final answer
    x = 113,840.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.