Home / 270,208.31-405,303.24-128,121.65

Finding the Fourth Proportional to 270,208.31, 405,303.24 and 128,121.65

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Solution

The fourth proportional to 270,208.31, 405,303.24 and 128,121.65 is: 192,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,208.31 : 405,303.24 = 128,121.65 : x
  2. Step 2: Convert to fraction form
    270,208.31/405,303.24 = 128,121.65/x
  3. Step 3: Cross multiply
    270,208.31x = 405,303.24 × 128,121.65
  4. Step 4: Simplify right side
    270,208.31x = 51,928,119,832.97
  5. Step 5: Solve for x
    x = 51,928,119,832.97/270,208.31
  6. Step 6: Final answer
    x = 192,178.10

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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.