Home / 280,256,000.20-420,384,000.30-124,809,507.70

Finding the Fourth Proportional to 280,256,000.20, 420,384,000.30 and 124,809,507.70

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Solution

The fourth proportional to 280,256,000.20, 420,384,000.30 and 124,809,507.70 is: 187,214,261.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,256,000.20 : 420,384,000.30 = 124,809,507.70 : x
  2. Step 2: Convert to fraction form
    280,256,000.20/420,384,000.30 = 124,809,507.70/x
  3. Step 3: Cross multiply
    280,256,000.20x = 420,384,000.30 × 124,809,507.70
  4. Step 4: Simplify right side
    280,256,000.20x = 52,467,920,122,399,656
  5. Step 5: Solve for x
    x = 52,467,920,122,399,656/280,256,000.20
  6. Step 6: Final answer
    x = 187,214,261.55

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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.