Home / 280,921.24-421,394.16-81,261.81

Finding the Fourth Proportional to 280,921.24, 421,394.16 and 81,261.81

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Solution

The fourth proportional to 280,921.24, 421,394.16 and 81,261.81 is: 121,896.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,921.24 : 421,394.16 = 81,261.81 : x
  2. Step 2: Convert to fraction form
    280,921.24/421,394.16 = 81,261.81/x
  3. Step 3: Cross multiply
    280,921.24x = 421,394.16 × 81,261.81
  4. Step 4: Simplify right side
    280,921.24x = 34,243,250,058.06
  5. Step 5: Solve for x
    x = 34,243,250,058.06/280,921.24
  6. Step 6: Final answer
    x = 121,896.27

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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.