Home / 81,540.78-112,478.49-51,278.10

Finding the Fourth Proportional to 81,540.78, 112,478.49 and 51,278.10

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Solution

The fourth proportional to 81,540.78, 112,478.49 and 51,278.10 is: 70,733.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,540.78 : 112,478.49 = 51,278.10 : x
  2. Step 2: Convert to fraction form
    81,540.78/112,478.49 = 51,278.10/x
  3. Step 3: Cross multiply
    81,540.78x = 112,478.49 × 51,278.10
  4. Step 4: Simplify right side
    81,540.78x = 5,767,683,258.07
  5. Step 5: Solve for x
    x = 5,767,683,258.07/81,540.78
  6. Step 6: Final answer
    x = 70,733.73

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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.