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Finding the Fourth Proportional to 78,851.80, 118,277.70 and 56,819.80

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Solution

The fourth proportional to 78,851.80, 118,277.70 and 56,819.80 is: 85,229.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,851.80 : 118,277.70 = 56,819.80 : x
  2. Step 2: Convert to fraction form
    78,851.80/118,277.70 = 56,819.80/x
  3. Step 3: Cross multiply
    78,851.80x = 118,277.70 × 56,819.80
  4. Step 4: Simplify right side
    78,851.80x = 6,720,515,258.46
  5. Step 5: Solve for x
    x = 6,720,515,258.46/78,851.80
  6. Step 6: Final answer
    x = 85,229.70

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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.