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Finding the Fourth Proportional to 118,289.28, 163,188.48 and 67,977.60

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Solution

The fourth proportional to 118,289.28, 163,188.48 and 67,977.60 is: 93,779.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,289.28 : 163,188.48 = 67,977.60 : x
  2. Step 2: Convert to fraction form
    118,289.28/163,188.48 = 67,977.60/x
  3. Step 3: Cross multiply
    118,289.28x = 163,188.48 × 67,977.60
  4. Step 4: Simplify right side
    118,289.28x = 11,093,161,218.05
  5. Step 5: Solve for x
    x = 11,093,161,218.05/118,289.28
  6. Step 6: Final answer
    x = 93,779.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.