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Finding the Fourth Proportional to 192,390.88, 288,430.92 and 80,155.64

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Solution

The fourth proportional to 192,390.88, 288,430.92 and 80,155.64 is: 120,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,390.88 : 288,430.92 = 80,155.64 : x
  2. Step 2: Convert to fraction form
    192,390.88/288,430.92 = 80,155.64/x
  3. Step 3: Cross multiply
    192,390.88x = 288,430.92 × 80,155.64
  4. Step 4: Simplify right side
    192,390.88x = 23,119,364,988.39
  5. Step 5: Solve for x
    x = 23,119,364,988.39/192,390.88
  6. Step 6: Final answer
    x = 120,168.72

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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.