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Finding the Fourth Proportional to 230,892.07, 318,627.78 and 128,919.16

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Solution

The fourth proportional to 230,892.07, 318,627.78 and 128,919.16 is: 177,906.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,892.07 : 318,627.78 = 128,919.16 : x
  2. Step 2: Convert to fraction form
    230,892.07/318,627.78 = 128,919.16/x
  3. Step 3: Cross multiply
    230,892.07x = 318,627.78 × 128,919.16
  4. Step 4: Simplify right side
    230,892.07x = 41,077,225,750.26
  5. Step 5: Solve for x
    x = 41,077,225,750.26/230,892.07
  6. Step 6: Final answer
    x = 177,906.61

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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.