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Finding the Fourth Proportional to 207,401.60, 311,140.80 and 67,164.80

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Solution

The fourth proportional to 207,401.60, 311,140.80 and 67,164.80 is: 100,759.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,401.60 : 311,140.80 = 67,164.80 : x
  2. Step 2: Convert to fraction form
    207,401.60/311,140.80 = 67,164.80/x
  3. Step 3: Cross multiply
    207,401.60x = 311,140.80 × 67,164.80
  4. Step 4: Simplify right side
    207,401.60x = 20,897,709,603.84
  5. Step 5: Solve for x
    x = 20,897,709,603.84/207,401.60
  6. Step 6: Final answer
    x = 100,759.64

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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.