Home / 128,511.90-192,767.85-117,431.10

Finding the Fourth Proportional to 128,511.90, 192,767.85 and 117,431.10

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Solution

The fourth proportional to 128,511.90, 192,767.85 and 117,431.10 is: 176,146.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,511.90 : 192,767.85 = 117,431.10 : x
  2. Step 2: Convert to fraction form
    128,511.90/192,767.85 = 117,431.10/x
  3. Step 3: Cross multiply
    128,511.90x = 192,767.85 × 117,431.10
  4. Step 4: Simplify right side
    128,511.90x = 22,636,940,670.14
  5. Step 5: Solve for x
    x = 22,636,940,670.14/128,511.90
  6. Step 6: Final answer
    x = 176,146.65

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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.