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Finding the Fourth Proportional to 427,940.01, 641,861.42 and 112,421.52

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Solution

The fourth proportional to 427,940.01, 641,861.42 and 112,421.52 is: 168,619.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,940.01 : 641,861.42 = 112,421.52 : x
  2. Step 2: Convert to fraction form
    427,940.01/641,861.42 = 112,421.52/x
  3. Step 3: Cross multiply
    427,940.01x = 641,861.42 × 112,421.52
  4. Step 4: Simplify right side
    427,940.01x = 72,159,035,903.65
  5. Step 5: Solve for x
    x = 72,159,035,903.65/427,940.01
  6. Step 6: Final answer
    x = 168,619.51

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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.