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Finding the Fourth Proportional to 66,720.34, 92,073.28 and 36,505.31

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Solution

The fourth proportional to 66,720.34, 92,073.28 and 36,505.31 is: 50,376.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,720.34 : 92,073.28 = 36,505.31 : x
  2. Step 2: Convert to fraction form
    66,720.34/92,073.28 = 36,505.31/x
  3. Step 3: Cross multiply
    66,720.34x = 92,073.28 × 36,505.31
  4. Step 4: Simplify right side
    66,720.34x = 3,361,163,629.12
  5. Step 5: Solve for x
    x = 3,361,163,629.12/66,720.34
  6. Step 6: Final answer
    x = 50,376.90

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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.