Home / 420,649.74-630,976.23-105,106.95

Finding the Fourth Proportional to 420,649.74, 630,976.23 and 105,106.95

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Solution

The fourth proportional to 420,649.74, 630,976.23 and 105,106.95 is: 157,660.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,649.74 : 630,976.23 = 105,106.95 : x
  2. Step 2: Convert to fraction form
    420,649.74/630,976.23 = 105,106.95/x
  3. Step 3: Cross multiply
    420,649.74x = 630,976.23 × 105,106.95
  4. Step 4: Simplify right side
    420,649.74x = 66,319,987,057.80
  5. Step 5: Solve for x
    x = 66,319,987,057.80/420,649.74
  6. Step 6: Final answer
    x = 157,660.83

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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.