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Finding the Fourth Proportional to 66,653.76, 91,983.29 and 39,798.62

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Solution

The fourth proportional to 66,653.76, 91,983.29 and 39,798.62 is: 54,922.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,653.76 : 91,983.29 = 39,798.62 : x
  2. Step 2: Convert to fraction form
    66,653.76/91,983.29 = 39,798.62/x
  3. Step 3: Cross multiply
    66,653.76x = 91,983.29 × 39,798.62
  4. Step 4: Simplify right side
    66,653.76x = 3,660,807,346.15
  5. Step 5: Solve for x
    x = 3,660,807,346.15/66,653.76
  6. Step 6: Final answer
    x = 54,922.74

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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.