Home / 128,307.88-192,226.38-115,907.32

Finding the Fourth Proportional to 128,307.88, 192,226.38 and 115,907.32

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Solution

The fourth proportional to 128,307.88, 192,226.38 and 115,907.32 is: 173,648.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,307.88 : 192,226.38 = 115,907.32 : x
  2. Step 2: Convert to fraction form
    128,307.88/192,226.38 = 115,907.32/x
  3. Step 3: Cross multiply
    128,307.88x = 192,226.38 × 115,907.32
  4. Step 4: Simplify right side
    128,307.88x = 22,280,444,539.10
  5. Step 5: Solve for x
    x = 22,280,444,539.10/128,307.88
  6. Step 6: Final answer
    x = 173,648.29

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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.