Home / 212,804.23-318,643.20-128,451.64

Finding the Fourth Proportional to 212,804.23, 318,643.20 and 128,451.64

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Solution

The fourth proportional to 212,804.23, 318,643.20 and 128,451.64 is: 192,337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,804.23 : 318,643.20 = 128,451.64 : x
  2. Step 2: Convert to fraction form
    212,804.23/318,643.20 = 128,451.64/x
  3. Step 3: Cross multiply
    212,804.23x = 318,643.20 × 128,451.64
  4. Step 4: Simplify right side
    212,804.23x = 40,930,241,614.85
  5. Step 5: Solve for x
    x = 40,930,241,614.85/212,804.23
  6. Step 6: Final answer
    x = 192,337.54

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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.