Home / 428,093.57-642,089.23-112,575.05

Finding the Fourth Proportional to 428,093.57, 642,089.23 and 112,575.05

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Solution

The fourth proportional to 428,093.57, 642,089.23 and 112,575.05 is: 168,849.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,093.57 : 642,089.23 = 112,575.05 : x
  2. Step 2: Convert to fraction form
    428,093.57/642,089.23 = 112,575.05/x
  3. Step 3: Cross multiply
    428,093.57x = 642,089.23 × 112,575.05
  4. Step 4: Simplify right side
    428,093.57x = 72,283,223,679.83
  5. Step 5: Solve for x
    x = 72,283,223,679.83/428,093.57
  6. Step 6: Final answer
    x = 168,849.12

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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.