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Finding the Fourth Proportional to 68,935.56, 95,128.56 and 42,122.94

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Solution

The fourth proportional to 68,935.56, 95,128.56 and 42,122.94 is: 58,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,935.56 : 95,128.56 = 42,122.94 : x
  2. Step 2: Convert to fraction form
    68,935.56/95,128.56 = 42,122.94/x
  3. Step 3: Cross multiply
    68,935.56x = 95,128.56 × 42,122.94
  4. Step 4: Simplify right side
    68,935.56x = 4,007,094,625.17
  5. Step 5: Solve for x
    x = 4,007,094,625.17/68,935.56
  6. Step 6: Final answer
    x = 58,128.12

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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.