Home / 121,284-181,704.34-87,921.32

Finding the Fourth Proportional to 121,284, 181,704.34 and 87,921.32

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Solution

The fourth proportional to 121,284, 181,704.34 and 87,921.32 is: 131,721.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,284 : 181,704.34 = 87,921.32 : x
  2. Step 2: Convert to fraction form
    121,284/181,704.34 = 87,921.32/x
  3. Step 3: Cross multiply
    121,284x = 181,704.34 × 87,921.32
  4. Step 4: Simplify right side
    121,284x = 15,975,685,422.53
  5. Step 5: Solve for x
    x = 15,975,685,422.53/121,284
  6. Step 6: Final answer
    x = 131,721.29

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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.