Home / 205,611.40-308,222.70-121,436.20

Finding the Fourth Proportional to 205,611.40, 308,222.70 and 121,436.20

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Solution

The fourth proportional to 205,611.40, 308,222.70 and 121,436.20 is: 182,039.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,611.40 : 308,222.70 = 121,436.20 : x
  2. Step 2: Convert to fraction form
    205,611.40/308,222.70 = 121,436.20/x
  3. Step 3: Cross multiply
    205,611.40x = 308,222.70 × 121,436.20
  4. Step 4: Simplify right side
    205,611.40x = 37,429,393,441.74
  5. Step 5: Solve for x
    x = 37,429,393,441.74/205,611.40
  6. Step 6: Final answer
    x = 182,039.49

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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.