Home / 428,626.46-642,876.50-113,105.54

Finding the Fourth Proportional to 428,626.46, 642,876.50 and 113,105.54

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Solution

The fourth proportional to 428,626.46, 642,876.50 and 113,105.54 is: 169,641.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,626.46 : 642,876.50 = 113,105.54 : x
  2. Step 2: Convert to fraction form
    428,626.46/642,876.50 = 113,105.54/x
  3. Step 3: Cross multiply
    428,626.46x = 642,876.50 × 113,105.54
  4. Step 4: Simplify right side
    428,626.46x = 72,712,893,685.81
  5. Step 5: Solve for x
    x = 72,712,893,685.81/428,626.46
  6. Step 6: Final answer
    x = 169,641.64

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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.