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Finding the Fourth Proportional to 78,838.52, 118,194.98 and 45,520.80

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Solution

The fourth proportional to 78,838.52, 118,194.98 and 45,520.80 is: 68,244.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,838.52 : 118,194.98 = 45,520.80 : x
  2. Step 2: Convert to fraction form
    78,838.52/118,194.98 = 45,520.80/x
  3. Step 3: Cross multiply
    78,838.52x = 118,194.98 × 45,520.80
  4. Step 4: Simplify right side
    78,838.52x = 5,380,330,045.58
  5. Step 5: Solve for x
    x = 5,380,330,045.58/78,838.52
  6. Step 6: Final answer
    x = 68,244.94

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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.