Home / 90,880.58-136,336.35-30,902.78

Finding the Fourth Proportional to 90,880.58, 136,336.35 and 30,902.78

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Solution

The fourth proportional to 90,880.58, 136,336.35 and 30,902.78 is: 46,359.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,880.58 : 136,336.35 = 30,902.78 : x
  2. Step 2: Convert to fraction form
    90,880.58/136,336.35 = 30,902.78/x
  3. Step 3: Cross multiply
    90,880.58x = 136,336.35 × 30,902.78
  4. Step 4: Simplify right side
    90,880.58x = 4,213,172,230.05
  5. Step 5: Solve for x
    x = 4,213,172,230.05/90,880.58
  6. Step 6: Final answer
    x = 46,359.43

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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.