Home / 428,597.76-642,939.84-113,076.48

Finding the Fourth Proportional to 428,597.76, 642,939.84 and 113,076.48

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Solution

The fourth proportional to 428,597.76, 642,939.84 and 113,076.48 is: 169,626.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,597.76 : 642,939.84 = 113,076.48 : x
  2. Step 2: Convert to fraction form
    428,597.76/642,939.84 = 113,076.48/x
  3. Step 3: Cross multiply
    428,597.76x = 642,939.84 × 113,076.48
  4. Step 4: Simplify right side
    428,597.76x = 72,701,373,958.96
  5. Step 5: Solve for x
    x = 72,701,373,958.96/428,597.76
  6. Step 6: Final answer
    x = 169,626.12

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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.