Home / 280,729.56-421,235.10-130,981.80

Finding the Fourth Proportional to 280,729.56, 421,235.10 and 130,981.80

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Solution

The fourth proportional to 280,729.56, 421,235.10 and 130,981.80 is: 196,538.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,729.56 : 421,235.10 = 130,981.80 : x
  2. Step 2: Convert to fraction form
    280,729.56/421,235.10 = 130,981.80/x
  3. Step 3: Cross multiply
    280,729.56x = 421,235.10 × 130,981.80
  4. Step 4: Simplify right side
    280,729.56x = 55,174,131,621.18
  5. Step 5: Solve for x
    x = 55,174,131,621.18/280,729.56
  6. Step 6: Final answer
    x = 196,538.38

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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.