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Finding the Fourth Proportional to 199,576.40, 299,364.60 and 128,717.60

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Solution

The fourth proportional to 199,576.40, 299,364.60 and 128,717.60 is: 193,076.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,576.40 : 299,364.60 = 128,717.60 : x
  2. Step 2: Convert to fraction form
    199,576.40/299,364.60 = 128,717.60/x
  3. Step 3: Cross multiply
    199,576.40x = 299,364.60 × 128,717.60
  4. Step 4: Simplify right side
    199,576.40x = 38,533,492,836.96
  5. Step 5: Solve for x
    x = 38,533,492,836.96/199,576.40
  6. Step 6: Final answer
    x = 193,076.40

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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.