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Finding the Fourth Proportional to 230,817.89, 318,544.70 and 128,863.40

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Solution

The fourth proportional to 230,817.89, 318,544.70 and 128,863.40 is: 177,840.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,817.89 : 318,544.70 = 128,863.40 : x
  2. Step 2: Convert to fraction form
    230,817.89/318,544.70 = 128,863.40/x
  3. Step 3: Cross multiply
    230,817.89x = 318,544.70 × 128,863.40
  4. Step 4: Simplify right side
    230,817.89x = 41,048,750,856.94
  5. Step 5: Solve for x
    x = 41,048,750,856.94/230,817.89
  6. Step 6: Final answer
    x = 177,840.43

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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.