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Finding the Fourth Proportional to 212,371.74, 318,274.50 and 79,117.80

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Solution

The fourth proportional to 212,371.74, 318,274.50 and 79,117.80 is: 118,571.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,371.74 : 318,274.50 = 79,117.80 : x
  2. Step 2: Convert to fraction form
    212,371.74/318,274.50 = 79,117.80/x
  3. Step 3: Cross multiply
    212,371.74x = 318,274.50 × 79,117.80
  4. Step 4: Simplify right side
    212,371.74x = 25,181,178,236.10
  5. Step 5: Solve for x
    x = 25,181,178,236.10/212,371.74
  6. Step 6: Final answer
    x = 118,571.23

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1.5x scale

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.