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Finding the Fourth Proportional to 192,060.80, 288,091.20 and 121,990.40

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Solution

The fourth proportional to 192,060.80, 288,091.20 and 121,990.40 is: 182,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,060.80 : 288,091.20 = 121,990.40 : x
  2. Step 2: Convert to fraction form
    192,060.80/288,091.20 = 121,990.40/x
  3. Step 3: Cross multiply
    192,060.80x = 288,091.20 × 121,990.40
  4. Step 4: Simplify right side
    192,060.80x = 35,144,360,724.48
  5. Step 5: Solve for x
    x = 35,144,360,724.48/192,060.80
  6. Step 6: Final answer
    x = 182,985.60

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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.