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Finding the Fourth Proportional to 128,283.60, 192,425.40 and 45,166.80

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Solution

The fourth proportional to 128,283.60, 192,425.40 and 45,166.80 is: 67,750.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,283.60 : 192,425.40 = 45,166.80 : x
  2. Step 2: Convert to fraction form
    128,283.60/192,425.40 = 45,166.80/x
  3. Step 3: Cross multiply
    128,283.60x = 192,425.40 × 45,166.80
  4. Step 4: Simplify right side
    128,283.60x = 8,691,239,556.72
  5. Step 5: Solve for x
    x = 8,691,239,556.72/128,283.60
  6. Step 6: Final answer
    x = 67,750.20

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1.5x scale

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.