Home / 158,121.95-218,213.46-90,137.69

Finding the Fourth Proportional to 158,121.95, 218,213.46 and 90,137.69

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Solution

The fourth proportional to 158,121.95, 218,213.46 and 90,137.69 is: 124,392.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,121.95 : 218,213.46 = 90,137.69 : x
  2. Step 2: Convert to fraction form
    158,121.95/218,213.46 = 90,137.69/x
  3. Step 3: Cross multiply
    158,121.95x = 218,213.46 × 90,137.69
  4. Step 4: Simplify right side
    158,121.95x = 19,669,256,120.24
  5. Step 5: Solve for x
    x = 19,669,256,120.24/158,121.95
  6. Step 6: Final answer
    x = 124,392.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.