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Finding the Fourth Proportional to 281,040.80, 421,415.40 and 103,456.40

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Solution

The fourth proportional to 281,040.80, 421,415.40 and 103,456.40 is: 155,130.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,040.80 : 421,415.40 = 103,456.40 : x
  2. Step 2: Convert to fraction form
    281,040.80/421,415.40 = 103,456.40/x
  3. Step 3: Cross multiply
    281,040.80x = 421,415.40 × 103,456.40
  4. Step 4: Simplify right side
    281,040.80x = 43,598,120,188.56
  5. Step 5: Solve for x
    x = 43,598,120,188.56/281,040.80
  6. Step 6: Final answer
    x = 155,130.93

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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.