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Finding the Fourth Proportional to 128,412.60, 192,849.30 and 93,391.80

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Solution

The fourth proportional to 128,412.60, 192,849.30 and 93,391.80 is: 140,255.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,412.60 : 192,849.30 = 93,391.80 : x
  2. Step 2: Convert to fraction form
    128,412.60/192,849.30 = 93,391.80/x
  3. Step 3: Cross multiply
    128,412.60x = 192,849.30 × 93,391.80
  4. Step 4: Simplify right side
    128,412.60x = 18,010,543,255.74
  5. Step 5: Solve for x
    x = 18,010,543,255.74/128,412.60
  6. Step 6: Final answer
    x = 140,255.27

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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.