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Finding the Fourth Proportional to 133,287.40, 183,933.62 and 72,858.12

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Solution

The fourth proportional to 133,287.40, 183,933.62 and 72,858.12 is: 100,542.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,287.40 : 183,933.62 = 72,858.12 : x
  2. Step 2: Convert to fraction form
    133,287.40/183,933.62 = 72,858.12/x
  3. Step 3: Cross multiply
    133,287.40x = 183,933.62 × 72,858.12
  4. Step 4: Simplify right side
    133,287.40x = 13,401,057,757.99
  5. Step 5: Solve for x
    x = 13,401,057,757.99/133,287.40
  6. Step 6: Final answer
    x = 100,542.57

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1.5x scale

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.