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Finding the Fourth Proportional to 201,612.55, 302,418.83 and 139,404.55

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Solution

The fourth proportional to 201,612.55, 302,418.83 and 139,404.55 is: 209,106.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,612.55 : 302,418.83 = 139,404.55 : x
  2. Step 2: Convert to fraction form
    201,612.55/302,418.83 = 139,404.55/x
  3. Step 3: Cross multiply
    201,612.55x = 302,418.83 × 139,404.55
  4. Step 4: Simplify right side
    201,612.55x = 42,158,560,907.68
  5. Step 5: Solve for x
    x = 42,158,560,907.68/201,612.55
  6. Step 6: Final answer
    x = 209,106.83

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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.