Home / 280,230,338.20-420,385,621.66-86,158,046.36

Finding the Fourth Proportional to 280,230,338.20, 420,385,621.66 and 86,158,046.36

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Solution

The fourth proportional to 280,230,338.20, 420,385,621.66 and 86,158,046.36 is: 129,249,402.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,230,338.20 : 420,385,621.66 = 86,158,046.36 : x
  2. Step 2: Convert to fraction form
    280,230,338.20/420,385,621.66 = 86,158,046.36/x
  3. Step 3: Cross multiply
    280,230,338.20x = 420,385,621.66 × 86,158,046.36
  4. Step 4: Simplify right side
    280,230,338.20x = 36,219,603,880,059,704
  5. Step 5: Solve for x
    x = 36,219,603,880,059,704/280,230,338.20
  6. Step 6: Final answer
    x = 129,249,402.88

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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.