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Finding the Fourth Proportional to 128,328, 192,492 and 53,483.40

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Solution

The fourth proportional to 128,328, 192,492 and 53,483.40 is: 80,225.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328 : 192,492 = 53,483.40 : x
  2. Step 2: Convert to fraction form
    128,328/192,492 = 53,483.40/x
  3. Step 3: Cross multiply
    128,328x = 192,492 × 53,483.40
  4. Step 4: Simplify right side
    128,328x = 10,295,126,632.80
  5. Step 5: Solve for x
    x = 10,295,126,632.80/128,328
  6. Step 6: Final answer
    x = 80,225.10

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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.