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Finding the Fourth Proportional to 68,485.79, 102,751.76 and 43,155.89

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Solution

The fourth proportional to 68,485.79, 102,751.76 and 43,155.89 is: 64,748.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,485.79 : 102,751.76 = 43,155.89 : x
  2. Step 2: Convert to fraction form
    68,485.79/102,751.76 = 43,155.89/x
  3. Step 3: Cross multiply
    68,485.79x = 102,751.76 × 43,155.89
  4. Step 4: Simplify right side
    68,485.79x = 4,434,342,922.33
  5. Step 5: Solve for x
    x = 4,434,342,922.33/68,485.79
  6. Step 6: Final answer
    x = 64,748.37

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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.