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Finding the Fourth Proportional to 118,465.80, 177,768.90 and 43,638.54

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Solution

The fourth proportional to 118,465.80, 177,768.90 and 43,638.54 is: 65,483.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,465.80 : 177,768.90 = 43,638.54 : x
  2. Step 2: Convert to fraction form
    118,465.80/177,768.90 = 43,638.54/x
  3. Step 3: Cross multiply
    118,465.80x = 177,768.90 × 43,638.54
  4. Step 4: Simplify right side
    118,465.80x = 7,757,575,253.41
  5. Step 5: Solve for x
    x = 7,757,575,253.41/118,465.80
  6. Step 6: Final answer
    x = 65,483.67

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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.