Home / 128,071.32-192,135.53-39,333.78

Finding the Fourth Proportional to 128,071.32, 192,135.53 and 39,333.78

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Solution

The fourth proportional to 128,071.32, 192,135.53 and 39,333.78 is: 59,009.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,071.32 : 192,135.53 = 39,333.78 : x
  2. Step 2: Convert to fraction form
    128,071.32/192,135.53 = 39,333.78/x
  3. Step 3: Cross multiply
    128,071.32x = 192,135.53 × 39,333.78
  4. Step 4: Simplify right side
    128,071.32x = 7,557,416,667.20
  5. Step 5: Solve for x
    x = 7,557,416,667.20/128,071.32
  6. Step 6: Final answer
    x = 59,009.44

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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.