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Finding the Fourth Proportional to 68,431.43, 94,430.22 and 42,936.47

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Solution

The fourth proportional to 68,431.43, 94,430.22 and 42,936.47 is: 59,249.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,431.43 : 94,430.22 = 42,936.47 : x
  2. Step 2: Convert to fraction form
    68,431.43/94,430.22 = 42,936.47/x
  3. Step 3: Cross multiply
    68,431.43x = 94,430.22 × 42,936.47
  4. Step 4: Simplify right side
    68,431.43x = 4,054,499,835.97
  5. Step 5: Solve for x
    x = 4,054,499,835.97/68,431.43
  6. Step 6: Final answer
    x = 59,249.09

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1.5x scale

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.