Home / 113,786.78-170,547.12-85,616.39

Finding the Fourth Proportional to 113,786.78, 170,547.12 and 85,616.39

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Solution

The fourth proportional to 113,786.78, 170,547.12 and 85,616.39 is: 128,324.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,786.78 : 170,547.12 = 85,616.39 : x
  2. Step 2: Convert to fraction form
    113,786.78/170,547.12 = 85,616.39/x
  3. Step 3: Cross multiply
    113,786.78x = 170,547.12 × 85,616.39
  4. Step 4: Simplify right side
    113,786.78x = 14,601,629,165.66
  5. Step 5: Solve for x
    x = 14,601,629,165.66/113,786.78
  6. Step 6: Final answer
    x = 128,324.48

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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.