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Finding the Fourth Proportional to 147,619.20, 221,428.80 and 137,704.80

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Solution

The fourth proportional to 147,619.20, 221,428.80 and 137,704.80 is: 206,557.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,619.20 : 221,428.80 = 137,704.80 : x
  2. Step 2: Convert to fraction form
    147,619.20/221,428.80 = 137,704.80/x
  3. Step 3: Cross multiply
    147,619.20x = 221,428.80 × 137,704.80
  4. Step 4: Simplify right side
    147,619.20x = 30,491,808,618.24
  5. Step 5: Solve for x
    x = 30,491,808,618.24/147,619.20
  6. Step 6: Final answer
    x = 206,557.20

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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.