Home / 128,511.10-192,766.65-115,389.10

Finding the Fourth Proportional to 128,511.10, 192,766.65 and 115,389.10

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Solution

The fourth proportional to 128,511.10, 192,766.65 and 115,389.10 is: 173,083.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,511.10 : 192,766.65 = 115,389.10 : x
  2. Step 2: Convert to fraction form
    128,511.10/192,766.65 = 115,389.10/x
  3. Step 3: Cross multiply
    128,511.10x = 192,766.65 × 115,389.10
  4. Step 4: Simplify right side
    128,511.10x = 22,243,170,253.52
  5. Step 5: Solve for x
    x = 22,243,170,253.52/128,511.10
  6. Step 6: Final answer
    x = 173,083.65

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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.