Home / 420,212.25-630,323.85-139,729.50

Finding the Fourth Proportional to 420,212.25, 630,323.85 and 139,729.50

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Solution

The fourth proportional to 420,212.25, 630,323.85 and 139,729.50 is: 209,596.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,212.25 : 630,323.85 = 139,729.50 : x
  2. Step 2: Convert to fraction form
    420,212.25/630,323.85 = 139,729.50/x
  3. Step 3: Cross multiply
    420,212.25x = 630,323.85 × 139,729.50
  4. Step 4: Simplify right side
    420,212.25x = 88,074,836,398.58
  5. Step 5: Solve for x
    x = 88,074,836,398.58/420,212.25
  6. Step 6: Final answer
    x = 209,596.07

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1.5x scale

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.