Home / 212,705.84-318,638.41-128,216.54

Finding the Fourth Proportional to 212,705.84, 318,638.41 and 128,216.54

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Solution

The fourth proportional to 212,705.84, 318,638.41 and 128,216.54 is: 192,071.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,705.84 : 318,638.41 = 128,216.54 : x
  2. Step 2: Convert to fraction form
    212,705.84/318,638.41 = 128,216.54/x
  3. Step 3: Cross multiply
    212,705.84x = 318,638.41 × 128,216.54
  4. Step 4: Simplify right side
    212,705.84x = 40,854,714,441.30
  5. Step 5: Solve for x
    x = 40,854,714,441.30/212,705.84
  6. Step 6: Final answer
    x = 192,071.43

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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.