Home / 280,157,128.40-420,298,678.20-165,082,437.20

Finding the Fourth Proportional to 280,157,128.40, 420,298,678.20 and 165,082,437.20

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Solution

The fourth proportional to 280,157,128.40, 420,298,678.20 and 165,082,437.20 is: 247,660,770.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,157,128.40 : 420,298,678.20 = 165,082,437.20 : x
  2. Step 2: Convert to fraction form
    280,157,128.40/420,298,678.20 = 165,082,437.20/x
  3. Step 3: Cross multiply
    280,157,128.40x = 420,298,678.20 × 165,082,437.20
  4. Step 4: Simplify right side
    280,157,128.40x = 69,383,930,149,194,504
  5. Step 5: Solve for x
    x = 69,383,930,149,194,504/280,157,128.40
  6. Step 6: Final answer
    x = 247,660,770.03

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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.