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Finding the Fourth Proportional to 216,485.56, 324,844.38 and 90,213.16

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Solution

The fourth proportional to 216,485.56, 324,844.38 and 90,213.16 is: 135,368.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,485.56 : 324,844.38 = 90,213.16 : x
  2. Step 2: Convert to fraction form
    216,485.56/324,844.38 = 90,213.16/x
  3. Step 3: Cross multiply
    216,485.56x = 324,844.38 × 90,213.16
  4. Step 4: Simplify right side
    216,485.56x = 29,305,238,028.04
  5. Step 5: Solve for x
    x = 29,305,238,028.04/216,485.56
  6. Step 6: Final answer
    x = 135,368.10

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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.