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Finding the Fourth Proportional to 200,397.60, 300,631.02 and 67,290.70

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Solution

The fourth proportional to 200,397.60, 300,631.02 and 67,290.70 is: 100,947.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,397.60 : 300,631.02 = 67,290.70 : x
  2. Step 2: Convert to fraction form
    200,397.60/300,631.02 = 67,290.70/x
  3. Step 3: Cross multiply
    200,397.60x = 300,631.02 × 67,290.70
  4. Step 4: Simplify right side
    200,397.60x = 20,229,671,777.51
  5. Step 5: Solve for x
    x = 20,229,671,777.51/200,397.60
  6. Step 6: Final answer
    x = 100,947.67

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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.