Home / 428,262.14-642,343.52-112,743.65

Finding the Fourth Proportional to 428,262.14, 642,343.52 and 112,743.65

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Solution

The fourth proportional to 428,262.14, 642,343.52 and 112,743.65 is: 169,102.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,262.14 : 642,343.52 = 112,743.65 : x
  2. Step 2: Convert to fraction form
    428,262.14/642,343.52 = 112,743.65/x
  3. Step 3: Cross multiply
    428,262.14x = 642,343.52 × 112,743.65
  4. Step 4: Simplify right side
    428,262.14x = 72,420,149,223.21
  5. Step 5: Solve for x
    x = 72,420,149,223.21/428,262.14
  6. Step 6: Final answer
    x = 169,102.39

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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.