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Finding the Fourth Proportional to 128,000.63, 191,993.75 and 39,253.89

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Solution

The fourth proportional to 128,000.63, 191,993.75 and 39,253.89 is: 58,878.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.63 : 191,993.75 = 39,253.89 : x
  2. Step 2: Convert to fraction form
    128,000.63/191,993.75 = 39,253.89/x
  3. Step 3: Cross multiply
    128,000.63x = 191,993.75 × 39,253.89
  4. Step 4: Simplify right side
    128,000.63x = 7,536,501,346.92
  5. Step 5: Solve for x
    x = 7,536,501,346.92/128,000.63
  6. Step 6: Final answer
    x = 58,878.63

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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.