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Finding the Fourth Proportional to 66,491.63, 91,758.44 and 38,213.72

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Solution

The fourth proportional to 66,491.63, 91,758.44 and 38,213.72 is: 52,734.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.63 : 91,758.44 = 38,213.72 : x
  2. Step 2: Convert to fraction form
    66,491.63/91,758.44 = 38,213.72/x
  3. Step 3: Cross multiply
    66,491.63x = 91,758.44 × 38,213.72
  4. Step 4: Simplify right side
    66,491.63x = 3,506,430,970.54
  5. Step 5: Solve for x
    x = 3,506,430,970.54/66,491.63
  6. Step 6: Final answer
    x = 52,734.93

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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.