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Finding the Fourth Proportional to 212,673.60, 318,616.80 and 123,969.60

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Solution

The fourth proportional to 212,673.60, 318,616.80 and 123,969.60 is: 185,724.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,673.60 : 318,616.80 = 123,969.60 : x
  2. Step 2: Convert to fraction form
    212,673.60/318,616.80 = 123,969.60/x
  3. Step 3: Cross multiply
    212,673.60x = 318,616.80 × 123,969.60
  4. Step 4: Simplify right side
    212,673.60x = 39,498,797,249.28
  5. Step 5: Solve for x
    x = 39,498,797,249.28/212,673.60
  6. Step 6: Final answer
    x = 185,724.97

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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.