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Finding the Fourth Proportional to 225,647.37, 311,397.21 and 123,670.80

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Solution

The fourth proportional to 225,647.37, 311,397.21 and 123,670.80 is: 170,667.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,647.37 : 311,397.21 = 123,670.80 : x
  2. Step 2: Convert to fraction form
    225,647.37/311,397.21 = 123,670.80/x
  3. Step 3: Cross multiply
    225,647.37x = 311,397.21 × 123,670.80
  4. Step 4: Simplify right side
    225,647.37x = 38,510,742,078.47
  5. Step 5: Solve for x
    x = 38,510,742,078.47/225,647.37
  6. Step 6: Final answer
    x = 170,667.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.