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Finding the Fourth Proportional to 192,008.80, 288,013.20 and 121,938.40

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Solution

The fourth proportional to 192,008.80, 288,013.20 and 121,938.40 is: 182,907.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,008.80 : 288,013.20 = 121,938.40 : x
  2. Step 2: Convert to fraction form
    192,008.80/288,013.20 = 121,938.40/x
  3. Step 3: Cross multiply
    192,008.80x = 288,013.20 × 121,938.40
  4. Step 4: Simplify right side
    192,008.80x = 35,119,868,786.88
  5. Step 5: Solve for x
    x = 35,119,868,786.88/192,008.80
  6. Step 6: Final answer
    x = 182,907.60

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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.