Home / 212,322.75-318,533.34-72,081.38

Finding the Fourth Proportional to 212,322.75, 318,533.34 and 72,081.38

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Solution

The fourth proportional to 212,322.75, 318,533.34 and 72,081.38 is: 108,138.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,322.75 : 318,533.34 = 72,081.38 : x
  2. Step 2: Convert to fraction form
    212,322.75/318,533.34 = 72,081.38/x
  3. Step 3: Cross multiply
    212,322.75x = 318,533.34 × 72,081.38
  4. Step 4: Simplify right side
    212,322.75x = 22,960,321,130.54
  5. Step 5: Solve for x
    x = 22,960,321,130.54/212,322.75
  6. Step 6: Final answer
    x = 108,138.77

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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.