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Finding the Fourth Proportional to 66,457, 91,709.40 and 36,242.56

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Solution

The fourth proportional to 66,457, 91,709.40 and 36,242.56 is: 50,014.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,457 : 91,709.40 = 36,242.56 : x
  2. Step 2: Convert to fraction form
    66,457/91,709.40 = 36,242.56/x
  3. Step 3: Cross multiply
    66,457x = 91,709.40 × 36,242.56
  4. Step 4: Simplify right side
    66,457x = 3,323,783,432.06
  5. Step 5: Solve for x
    x = 3,323,783,432.06/66,457
  6. Step 6: Final answer
    x = 50,014.05

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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.