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Finding the Fourth Proportional to 213,928.80, 321,123.60 and 120,616.80

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Solution

The fourth proportional to 213,928.80, 321,123.60 and 120,616.80 is: 181,055.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,928.80 : 321,123.60 = 120,616.80 : x
  2. Step 2: Convert to fraction form
    213,928.80/321,123.60 = 120,616.80/x
  3. Step 3: Cross multiply
    213,928.80x = 321,123.60 × 120,616.80
  4. Step 4: Simplify right side
    213,928.80x = 38,732,901,036.48
  5. Step 5: Solve for x
    x = 38,732,901,036.48/213,928.80
  6. Step 6: Final answer
    x = 181,055.10

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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.