Home / 280,987.38-421,478.78-121,176.32

Finding the Fourth Proportional to 280,987.38, 421,478.78 and 121,176.32

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Solution

The fourth proportional to 280,987.38, 421,478.78 and 121,176.32 is: 181,763.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,987.38 : 421,478.78 = 121,176.32 : x
  2. Step 2: Convert to fraction form
    280,987.38/421,478.78 = 121,176.32/x
  3. Step 3: Cross multiply
    280,987.38x = 421,478.78 × 121,176.32
  4. Step 4: Simplify right side
    280,987.38x = 51,073,244,805.21
  5. Step 5: Solve for x
    x = 51,073,244,805.21/280,987.38
  6. Step 6: Final answer
    x = 181,763.48

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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.