Home / 212,704.84-318,636.91-128,215.54

Finding the Fourth Proportional to 212,704.84, 318,636.91 and 128,215.54

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Solution

The fourth proportional to 212,704.84, 318,636.91 and 128,215.54 is: 192,069.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,704.84 : 318,636.91 = 128,215.54 : x
  2. Step 2: Convert to fraction form
    212,704.84/318,636.91 = 128,215.54/x
  3. Step 3: Cross multiply
    212,704.84x = 318,636.91 × 128,215.54
  4. Step 4: Simplify right side
    212,704.84x = 40,854,203,479.58
  5. Step 5: Solve for x
    x = 40,854,203,479.58/212,704.84
  6. Step 6: Final answer
    x = 192,069.93

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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.