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Finding the Fourth Proportional to 143,795.20, 215,692.80 and 80,809.60

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Solution

The fourth proportional to 143,795.20, 215,692.80 and 80,809.60 is: 121,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,795.20 : 215,692.80 = 80,809.60 : x
  2. Step 2: Convert to fraction form
    143,795.20/215,692.80 = 80,809.60/x
  3. Step 3: Cross multiply
    143,795.20x = 215,692.80 × 80,809.60
  4. Step 4: Simplify right side
    143,795.20x = 17,430,048,890.88
  5. Step 5: Solve for x
    x = 17,430,048,890.88/143,795.20
  6. Step 6: Final answer
    x = 121,214.40

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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.