Home / 280,839.28-421,325.72-91,300.48

Finding the Fourth Proportional to 280,839.28, 421,325.72 and 91,300.48

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Solution

The fourth proportional to 280,839.28, 421,325.72 and 91,300.48 is: 136,972.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,839.28 : 421,325.72 = 91,300.48 : x
  2. Step 2: Convert to fraction form
    280,839.28/421,325.72 = 91,300.48/x
  3. Step 3: Cross multiply
    280,839.28x = 421,325.72 × 91,300.48
  4. Step 4: Simplify right side
    280,839.28x = 38,467,240,472.35
  5. Step 5: Solve for x
    x = 38,467,240,472.35/280,839.28
  6. Step 6: Final answer
    x = 136,972.44

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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.