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Finding the Fourth Proportional to 200,421.20, 300,048.60 and 121,494.80

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Solution

The fourth proportional to 200,421.20, 300,048.60 and 121,494.80 is: 181,888.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,421.20 : 300,048.60 = 121,494.80 : x
  2. Step 2: Convert to fraction form
    200,421.20/300,048.60 = 121,494.80/x
  3. Step 3: Cross multiply
    200,421.20x = 300,048.60 × 121,494.80
  4. Step 4: Simplify right side
    200,421.20x = 36,454,344,647.28
  5. Step 5: Solve for x
    x = 36,454,344,647.28/200,421.20
  6. Step 6: Final answer
    x = 181,888.67

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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.