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Finding the Fourth Proportional to 281,080.80, 421,621.20 and 141,112.80

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Solution

The fourth proportional to 281,080.80, 421,621.20 and 141,112.80 is: 211,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,080.80 : 421,621.20 = 141,112.80 : x
  2. Step 2: Convert to fraction form
    281,080.80/421,621.20 = 141,112.80/x
  3. Step 3: Cross multiply
    281,080.80x = 421,621.20 × 141,112.80
  4. Step 4: Simplify right side
    281,080.80x = 59,496,148,071.36
  5. Step 5: Solve for x
    x = 59,496,148,071.36/281,080.80
  6. Step 6: Final answer
    x = 211,669.20

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1.5x scale

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.