Home / 428,663.96-642,932.76-113,143.04

Finding the Fourth Proportional to 428,663.96, 642,932.76 and 113,143.04

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Solution

The fourth proportional to 428,663.96, 642,932.76 and 113,143.04 is: 169,697.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,663.96 : 642,932.76 = 113,143.04 : x
  2. Step 2: Convert to fraction form
    428,663.96/642,932.76 = 113,143.04/x
  3. Step 3: Cross multiply
    428,663.96x = 642,932.76 × 113,143.04
  4. Step 4: Simplify right side
    428,663.96x = 72,743,366,981.99
  5. Step 5: Solve for x
    x = 72,743,366,981.99/428,663.96
  6. Step 6: Final answer
    x = 169,697.88

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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.