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Finding the Fourth Proportional to 78,824.80, 118,237.20 and 72,373.60

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Solution

The fourth proportional to 78,824.80, 118,237.20 and 72,373.60 is: 108,560.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,824.80 : 118,237.20 = 72,373.60 : x
  2. Step 2: Convert to fraction form
    78,824.80/118,237.20 = 72,373.60/x
  3. Step 3: Cross multiply
    78,824.80x = 118,237.20 × 72,373.60
  4. Step 4: Simplify right side
    78,824.80x = 8,557,251,817.92
  5. Step 5: Solve for x
    x = 8,557,251,817.92/78,824.80
  6. Step 6: Final answer
    x = 108,560.40

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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.