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Finding the Fourth Proportional to 139,305.15, 208,957.73 and 132,889.95

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Solution

The fourth proportional to 139,305.15, 208,957.73 and 132,889.95 is: 199,334.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,305.15 : 208,957.73 = 132,889.95 : x
  2. Step 2: Convert to fraction form
    139,305.15/208,957.73 = 132,889.95/x
  3. Step 3: Cross multiply
    139,305.15x = 208,957.73 × 132,889.95
  4. Step 4: Simplify right side
    139,305.15x = 27,768,381,627.36
  5. Step 5: Solve for x
    x = 27,768,381,627.36/139,305.15
  6. Step 6: Final answer
    x = 199,334.93

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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.