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Finding the Fourth Proportional to 78,877.19, 118,245.62 and 28,945.86

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Solution

The fourth proportional to 78,877.19, 118,245.62 and 28,945.86 is: 43,393.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,877.19 : 118,245.62 = 28,945.86 : x
  2. Step 2: Convert to fraction form
    78,877.19/118,245.62 = 28,945.86/x
  3. Step 3: Cross multiply
    78,877.19x = 118,245.62 × 28,945.86
  4. Step 4: Simplify right side
    78,877.19x = 3,422,720,791.08
  5. Step 5: Solve for x
    x = 3,422,720,791.08/78,877.19
  6. Step 6: Final answer
    x = 43,393.04

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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.