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Finding the Fourth Proportional to 133,068.64, 183,633.08 and 72,639.68

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Solution

The fourth proportional to 133,068.64, 183,633.08 and 72,639.68 is: 100,241.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,068.64 : 183,633.08 = 72,639.68 : x
  2. Step 2: Convert to fraction form
    133,068.64/183,633.08 = 72,639.68/x
  3. Step 3: Cross multiply
    133,068.64x = 183,633.08 × 72,639.68
  4. Step 4: Simplify right side
    133,068.64x = 13,339,048,168.61
  5. Step 5: Solve for x
    x = 13,339,048,168.61/133,068.64
  6. Step 6: Final answer
    x = 100,241.86

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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.