Home / 428,277.15-642,448.53-112,729.50

Finding the Fourth Proportional to 428,277.15, 642,448.53 and 112,729.50

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Solution

The fourth proportional to 428,277.15, 642,448.53 and 112,729.50 is: 169,102.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,277.15 : 642,448.53 = 112,729.50 : x
  2. Step 2: Convert to fraction form
    428,277.15/642,448.53 = 112,729.50/x
  3. Step 3: Cross multiply
    428,277.15x = 642,448.53 × 112,729.50
  4. Step 4: Simplify right side
    428,277.15x = 72,422,901,562.64
  5. Step 5: Solve for x
    x = 72,422,901,562.64/428,277.15
  6. Step 6: Final answer
    x = 169,102.88

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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.