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Finding the Fourth Proportional to 92,912.78, 128,258.88 and 62,738.97

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Solution

The fourth proportional to 92,912.78, 128,258.88 and 62,738.97 is: 86,606.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.78 : 128,258.88 = 62,738.97 : x
  2. Step 2: Convert to fraction form
    92,912.78/128,258.88 = 62,738.97/x
  3. Step 3: Cross multiply
    92,912.78x = 128,258.88 × 62,738.97
  4. Step 4: Simplify right side
    92,912.78x = 8,046,829,308.31
  5. Step 5: Solve for x
    x = 8,046,829,308.31/92,912.78
  6. Step 6: Final answer
    x = 86,606.27

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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.