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Finding the Fourth Proportional to 118,701.39, 178,078.75 and 39,813.60

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Solution

The fourth proportional to 118,701.39, 178,078.75 and 39,813.60 is: 59,729.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,701.39 : 178,078.75 = 39,813.60 : x
  2. Step 2: Convert to fraction form
    118,701.39/178,078.75 = 39,813.60/x
  3. Step 3: Cross multiply
    118,701.39x = 178,078.75 × 39,813.60
  4. Step 4: Simplify right side
    118,701.39x = 7,089,956,021.47
  5. Step 5: Solve for x
    x = 7,089,956,021.47/118,701.39
  6. Step 6: Final answer
    x = 59,729.34

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1.5x scale

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.