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Finding the Fourth Proportional to 199,672.36, 299,579.82 and 85,772.32

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Solution

The fourth proportional to 199,672.36, 299,579.82 and 85,772.32 is: 128,689.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,672.36 : 299,579.82 = 85,772.32 : x
  2. Step 2: Convert to fraction form
    199,672.36/299,579.82 = 85,772.32/x
  3. Step 3: Cross multiply
    199,672.36x = 299,579.82 × 85,772.32
  4. Step 4: Simplify right side
    199,672.36x = 25,695,656,186.58
  5. Step 5: Solve for x
    x = 25,695,656,186.58/199,672.36
  6. Step 6: Final answer
    x = 128,689.10

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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.