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Finding the Fourth Proportional to 66,215.30, 91,346.21 and 40,711.46

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Solution

The fourth proportional to 66,215.30, 91,346.21 and 40,711.46 is: 56,162.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,215.30 : 91,346.21 = 40,711.46 : x
  2. Step 2: Convert to fraction form
    66,215.30/91,346.21 = 40,711.46/x
  3. Step 3: Cross multiply
    66,215.30x = 91,346.21 × 40,711.46
  4. Step 4: Simplify right side
    66,215.30x = 3,718,837,466.27
  5. Step 5: Solve for x
    x = 3,718,837,466.27/66,215.30
  6. Step 6: Final answer
    x = 56,162.81

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.