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Finding the Fourth Proportional to 318,315.25, 477,371.43 and 105,043.42

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Solution

The fourth proportional to 318,315.25, 477,371.43 and 105,043.42 is: 157,531.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,315.25 : 477,371.43 = 105,043.42 : x
  2. Step 2: Convert to fraction form
    318,315.25/477,371.43 = 105,043.42/x
  3. Step 3: Cross multiply
    318,315.25x = 477,371.43 × 105,043.42
  4. Step 4: Simplify right side
    318,315.25x = 50,144,727,617.49
  5. Step 5: Solve for x
    x = 50,144,727,617.49/318,315.25
  6. Step 6: Final answer
    x = 157,531.65

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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.