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Finding the Fourth Proportional to 139,999.59, 209,998.47 and 83,855.66

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Solution

The fourth proportional to 139,999.59, 209,998.47 and 83,855.66 is: 125,782.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,999.59 : 209,998.47 = 83,855.66 : x
  2. Step 2: Convert to fraction form
    139,999.59/209,998.47 = 83,855.66/x
  3. Step 3: Cross multiply
    139,999.59x = 209,998.47 × 83,855.66
  4. Step 4: Simplify right side
    139,999.59x = 17,609,559,565.31
  5. Step 5: Solve for x
    x = 17,609,559,565.31/139,999.59
  6. Step 6: Final answer
    x = 125,782.94

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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.