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Finding the Fourth Proportional to 279,349.81, 418,955.36 and 79,671.94

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Solution

The fourth proportional to 279,349.81, 418,955.36 and 79,671.94 is: 119,488.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,349.81 : 418,955.36 = 79,671.94 : x
  2. Step 2: Convert to fraction form
    279,349.81/418,955.36 = 79,671.94/x
  3. Step 3: Cross multiply
    279,349.81x = 418,955.36 × 79,671.94
  4. Step 4: Simplify right side
    279,349.81x = 33,378,984,858.85
  5. Step 5: Solve for x
    x = 33,378,984,858.85/279,349.81
  6. Step 6: Final answer
    x = 119,488.13

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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.