Home / 219,621.26-303,080.70-128,979.14

Finding the Fourth Proportional to 219,621.26, 303,080.70 and 128,979.14

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Solution

The fourth proportional to 219,621.26, 303,080.70 and 128,979.14 is: 177,993.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,621.26 : 303,080.70 = 128,979.14 : x
  2. Step 2: Convert to fraction form
    219,621.26/303,080.70 = 128,979.14/x
  3. Step 3: Cross multiply
    219,621.26x = 303,080.70 × 128,979.14
  4. Step 4: Simplify right side
    219,621.26x = 39,091,088,036.60
  5. Step 5: Solve for x
    x = 39,091,088,036.60/219,621.26
  6. Step 6: Final answer
    x = 177,993.19

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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.