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Finding the Fourth Proportional to 192,415.60, 288,623.40 and 121,556.80

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Solution

The fourth proportional to 192,415.60, 288,623.40 and 121,556.80 is: 182,335.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,415.60 : 288,623.40 = 121,556.80 : x
  2. Step 2: Convert to fraction form
    192,415.60/288,623.40 = 121,556.80/x
  3. Step 3: Cross multiply
    192,415.60x = 288,623.40 × 121,556.80
  4. Step 4: Simplify right side
    192,415.60x = 35,084,136,909.12
  5. Step 5: Solve for x
    x = 35,084,136,909.12/192,415.60
  6. Step 6: Final answer
    x = 182,335.20

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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.