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Finding the Fourth Proportional to 133,167.81, 183,771.36 and 72,738.45

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Solution

The fourth proportional to 133,167.81, 183,771.36 and 72,738.45 is: 100,378.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,167.81 : 183,771.36 = 72,738.45 : x
  2. Step 2: Convert to fraction form
    133,167.81/183,771.36 = 72,738.45/x
  3. Step 3: Cross multiply
    133,167.81x = 183,771.36 × 72,738.45
  4. Step 4: Simplify right side
    133,167.81x = 13,367,243,880.79
  5. Step 5: Solve for x
    x = 13,367,243,880.79/133,167.81
  6. Step 6: Final answer
    x = 100,378.94

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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.