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Finding the Fourth Proportional to 99,799.40, 149,738.70 and 40,639.40

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Solution

The fourth proportional to 99,799.40, 149,738.70 and 40,639.40 is: 60,975.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,799.40 : 149,738.70 = 40,639.40 : x
  2. Step 2: Convert to fraction form
    99,799.40/149,738.70 = 40,639.40/x
  3. Step 3: Cross multiply
    99,799.40x = 149,738.70 × 40,639.40
  4. Step 4: Simplify right side
    99,799.40x = 6,085,290,924.78
  5. Step 5: Solve for x
    x = 6,085,290,924.78/99,799.40
  6. Step 6: Final answer
    x = 60,975.23

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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.