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Finding the Fourth Proportional to 128,609.94, 192,946.50 and 103,874.16

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Solution

The fourth proportional to 128,609.94, 192,946.50 and 103,874.16 is: 155,836.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,609.94 : 192,946.50 = 103,874.16 : x
  2. Step 2: Convert to fraction form
    128,609.94/192,946.50 = 103,874.16/x
  3. Step 3: Cross multiply
    128,609.94x = 192,946.50 × 103,874.16
  4. Step 4: Simplify right side
    128,609.94x = 20,042,155,612.44
  5. Step 5: Solve for x
    x = 20,042,155,612.44/128,609.94
  6. Step 6: Final answer
    x = 155,836.75

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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.