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Finding the Fourth Proportional to 139,999.73, 193,216.25 and 88,391.79

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Solution

The fourth proportional to 139,999.73, 193,216.25 and 88,391.79 is: 121,991.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,999.73 : 193,216.25 = 88,391.79 : x
  2. Step 2: Convert to fraction form
    139,999.73/193,216.25 = 88,391.79/x
  3. Step 3: Cross multiply
    139,999.73x = 193,216.25 × 88,391.79
  4. Step 4: Simplify right side
    139,999.73x = 17,078,730,415.57
  5. Step 5: Solve for x
    x = 17,078,730,415.57/139,999.73
  6. Step 6: Final answer
    x = 121,991.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.