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Finding the Fourth Proportional to 281,080.80, 421,475.40 and 103,496.40

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Solution

The fourth proportional to 281,080.80, 421,475.40 and 103,496.40 is: 155,190.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,080.80 : 421,475.40 = 103,496.40 : x
  2. Step 2: Convert to fraction form
    281,080.80/421,475.40 = 103,496.40/x
  3. Step 3: Cross multiply
    281,080.80x = 421,475.40 × 103,496.40
  4. Step 4: Simplify right side
    281,080.80x = 43,621,186,588.56
  5. Step 5: Solve for x
    x = 43,621,186,588.56/281,080.80
  6. Step 6: Final answer
    x = 155,190.92

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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.