Home / 280,003.10-420,002.67-80,323.70

Finding the Fourth Proportional to 280,003.10, 420,002.67 and 80,323.70

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Solution

The fourth proportional to 280,003.10, 420,002.67 and 80,323.70 is: 120,484.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,003.10 : 420,002.67 = 80,323.70 : x
  2. Step 2: Convert to fraction form
    280,003.10/420,002.67 = 80,323.70/x
  3. Step 3: Cross multiply
    280,003.10x = 420,002.67 × 80,323.70
  4. Step 4: Simplify right side
    280,003.10x = 33,736,168,464.28
  5. Step 5: Solve for x
    x = 33,736,168,464.28/280,003.10
  6. Step 6: Final answer
    x = 120,484.98

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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.