Home / 280,157,129.40-420,298,679.70-165,082,438.20

Finding the Fourth Proportional to 280,157,129.40, 420,298,679.70 and 165,082,438.20

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Solution

The fourth proportional to 280,157,129.40, 420,298,679.70 and 165,082,438.20 is: 247,660,771.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,157,129.40 : 420,298,679.70 = 165,082,438.20 : x
  2. Step 2: Convert to fraction form
    280,157,129.40/420,298,679.70 = 165,082,438.20/x
  3. Step 3: Cross multiply
    280,157,129.40x = 420,298,679.70 × 165,082,438.20
  4. Step 4: Simplify right side
    280,157,129.40x = 69,383,930,817,116,840
  5. Step 5: Solve for x
    x = 69,383,930,817,116,840/280,157,129.40
  6. Step 6: Final answer
    x = 247,660,771.53

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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.