Home / 420,150.90-630,226.35-139,631.70

Finding the Fourth Proportional to 420,150.90, 630,226.35 and 139,631.70

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Solution

The fourth proportional to 420,150.90, 630,226.35 and 139,631.70 is: 209,447.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,150.90 : 630,226.35 = 139,631.70 : x
  2. Step 2: Convert to fraction form
    420,150.90/630,226.35 = 139,631.70/x
  3. Step 3: Cross multiply
    420,150.90x = 630,226.35 × 139,631.70
  4. Step 4: Simplify right side
    420,150.90x = 87,999,576,635.30
  5. Step 5: Solve for x
    x = 87,999,576,635.30/420,150.90
  6. Step 6: Final answer
    x = 209,447.55

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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.