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Finding the Fourth Proportional to 230,906.40, 318,656.24 and 128,928.40

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Solution

The fourth proportional to 230,906.40, 318,656.24 and 128,928.40 is: 177,924.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,906.40 : 318,656.24 = 128,928.40 : x
  2. Step 2: Convert to fraction form
    230,906.40/318,656.24 = 128,928.40/x
  3. Step 3: Cross multiply
    230,906.40x = 318,656.24 × 128,928.40
  4. Step 4: Simplify right side
    230,906.40x = 41,083,839,173.22
  5. Step 5: Solve for x
    x = 41,083,839,173.22/230,906.40
  6. Step 6: Final answer
    x = 177,924.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.