Home / 225,719.37-311,515.02-128,937.71

Finding the Fourth Proportional to 225,719.37, 311,515.02 and 128,937.71

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Solution

The fourth proportional to 225,719.37, 311,515.02 and 128,937.71 is: 177,946.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,719.37 : 311,515.02 = 128,937.71 : x
  2. Step 2: Convert to fraction form
    225,719.37/311,515.02 = 128,937.71/x
  3. Step 3: Cross multiply
    225,719.37x = 311,515.02 × 128,937.71
  4. Step 4: Simplify right side
    225,719.37x = 40,166,033,309.40
  5. Step 5: Solve for x
    x = 40,166,033,309.40/225,719.37
  6. Step 6: Final answer
    x = 177,946.77

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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.