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Finding the Fourth Proportional to 281,087.76, 421,577.28 and 81,357.60

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Solution

The fourth proportional to 281,087.76, 421,577.28 and 81,357.60 is: 122,020.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,087.76 : 421,577.28 = 81,357.60 : x
  2. Step 2: Convert to fraction form
    281,087.76/421,577.28 = 81,357.60/x
  3. Step 3: Cross multiply
    281,087.76x = 421,577.28 × 81,357.60
  4. Step 4: Simplify right side
    281,087.76x = 34,298,515,715.33
  5. Step 5: Solve for x
    x = 34,298,515,715.33/281,087.76
  6. Step 6: Final answer
    x = 122,020.67

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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.