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Finding the Fourth Proportional to 192,728.70, 288,969.72 and 92,689.65

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Solution

The fourth proportional to 192,728.70, 288,969.72 and 92,689.65 is: 138,975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,728.70 : 288,969.72 = 92,689.65 : x
  2. Step 2: Convert to fraction form
    192,728.70/288,969.72 = 92,689.65/x
  3. Step 3: Cross multiply
    192,728.70x = 288,969.72 × 92,689.65
  4. Step 4: Simplify right side
    192,728.70x = 26,784,502,207.40
  5. Step 5: Solve for x
    x = 26,784,502,207.40/192,728.70
  6. Step 6: Final answer
    x = 138,975.16

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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.