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Finding the Fourth Proportional to 118,550.72, 163,337.44 and 78,193.28

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Solution

The fourth proportional to 118,550.72, 163,337.44 and 78,193.28 is: 107,733.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,550.72 : 163,337.44 = 78,193.28 : x
  2. Step 2: Convert to fraction form
    118,550.72/163,337.44 = 78,193.28/x
  3. Step 3: Cross multiply
    118,550.72x = 163,337.44 × 78,193.28
  4. Step 4: Simplify right side
    118,550.72x = 12,771,890,180.40
  5. Step 5: Solve for x
    x = 12,771,890,180.40/118,550.72
  6. Step 6: Final answer
    x = 107,733.55

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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.