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Finding the Fourth Proportional to 118,984.86, 178,419.87 and 69,077.52

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Solution

The fourth proportional to 118,984.86, 178,419.87 and 69,077.52 is: 103,582.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,984.86 : 178,419.87 = 69,077.52 : x
  2. Step 2: Convert to fraction form
    118,984.86/178,419.87 = 69,077.52/x
  3. Step 3: Cross multiply
    118,984.86x = 178,419.87 × 69,077.52
  4. Step 4: Simplify right side
    118,984.86x = 12,324,801,246.22
  5. Step 5: Solve for x
    x = 12,324,801,246.22/118,984.86
  6. Step 6: Final answer
    x = 103,582.94

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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.