Home / 212,138.01-318,295.13-85,867.52

Finding the Fourth Proportional to 212,138.01, 318,295.13 and 85,867.52

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Solution

The fourth proportional to 212,138.01, 318,295.13 and 85,867.52 is: 128,836.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,138.01 : 318,295.13 = 85,867.52 : x
  2. Step 2: Convert to fraction form
    212,138.01/318,295.13 = 85,867.52/x
  3. Step 3: Cross multiply
    212,138.01x = 318,295.13 × 85,867.52
  4. Step 4: Simplify right side
    212,138.01x = 27,331,212,064.37
  5. Step 5: Solve for x
    x = 27,331,212,064.37/212,138.01
  6. Step 6: Final answer
    x = 128,836.94

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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.