Home / 420,116.91-630,172.12-104,571.69

Finding the Fourth Proportional to 420,116.91, 630,172.12 and 104,571.69

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Solution

The fourth proportional to 420,116.91, 630,172.12 and 104,571.69 is: 156,856.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,116.91 : 630,172.12 = 104,571.69 : x
  2. Step 2: Convert to fraction form
    420,116.91/630,172.12 = 104,571.69/x
  3. Step 3: Cross multiply
    420,116.91x = 630,172.12 × 104,571.69
  4. Step 4: Simplify right side
    420,116.91x = 65,898,163,579.28
  5. Step 5: Solve for x
    x = 65,898,163,579.28/420,116.91
  6. Step 6: Final answer
    x = 156,856.73

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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.