Home / 128,395.10-192,189-88,178.60

Finding the Fourth Proportional to 128,395.10, 192,189 and 88,178.60

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Solution

The fourth proportional to 128,395.10, 192,189 and 88,178.60 is: 131,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,395.10 : 192,189 = 88,178.60 : x
  2. Step 2: Convert to fraction form
    128,395.10/192,189 = 88,178.60/x
  3. Step 3: Cross multiply
    128,395.10x = 192,189 × 88,178.60
  4. Step 4: Simplify right side
    128,395.10x = 16,946,956,955.40
  5. Step 5: Solve for x
    x = 16,946,956,955.40/128,395.10
  6. Step 6: Final answer
    x = 131,990.68

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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.