Home / 280,040,980.60-420,058,091.85-72,761,049.91

Finding the Fourth Proportional to 280,040,980.60, 420,058,091.85 and 72,761,049.91

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Solution

The fourth proportional to 280,040,980.60, 420,058,091.85 and 72,761,049.91 is: 109,140,696.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,040,980.60 : 420,058,091.85 = 72,761,049.91 : x
  2. Step 2: Convert to fraction form
    280,040,980.60/420,058,091.85 = 72,761,049.91/x
  3. Step 3: Cross multiply
    280,040,980.60x = 420,058,091.85 × 72,761,049.91
  4. Step 4: Simplify right side
    280,040,980.60x = 30,563,867,786,197,216
  5. Step 5: Solve for x
    x = 30,563,867,786,197,216/280,040,980.60
  6. Step 6: Final answer
    x = 109,140,696.91

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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.