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Finding the Fourth Proportional to 279,631.64, 419,668.90 and 121,970.81

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Solution

The fourth proportional to 279,631.64, 419,668.90 and 121,970.81 is: 183,052.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,631.64 : 419,668.90 = 121,970.81 : x
  2. Step 2: Convert to fraction form
    279,631.64/419,668.90 = 121,970.81/x
  3. Step 3: Cross multiply
    279,631.64x = 419,668.90 × 121,970.81
  4. Step 4: Simplify right side
    279,631.64x = 51,187,356,409.05
  5. Step 5: Solve for x
    x = 51,187,356,409.05/279,631.64
  6. Step 6: Final answer
    x = 183,052.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.