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Finding the Fourth Proportional to 128,279.60, 192,030.60 and 93,287.60

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Solution

The fourth proportional to 128,279.60, 192,030.60 and 93,287.60 is: 139,648.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,279.60 : 192,030.60 = 93,287.60 : x
  2. Step 2: Convert to fraction form
    128,279.60/192,030.60 = 93,287.60/x
  3. Step 3: Cross multiply
    128,279.60x = 192,030.60 × 93,287.60
  4. Step 4: Simplify right side
    128,279.60x = 17,914,073,800.56
  5. Step 5: Solve for x
    x = 17,914,073,800.56/128,279.60
  6. Step 6: Final answer
    x = 139,648.66

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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.