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Finding the Fourth Proportional to 66,694.74, 91,995.36 and 42,783.54

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Solution

The fourth proportional to 66,694.74, 91,995.36 and 42,783.54 is: 59,013.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,694.74 : 91,995.36 = 42,783.54 : x
  2. Step 2: Convert to fraction form
    66,694.74/91,995.36 = 42,783.54/x
  3. Step 3: Cross multiply
    66,694.74x = 91,995.36 × 42,783.54
  4. Step 4: Simplify right side
    66,694.74x = 3,935,887,164.37
  5. Step 5: Solve for x
    x = 3,935,887,164.37/66,694.74
  6. Step 6: Final answer
    x = 59,013.46

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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.