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Finding the Fourth Proportional to 136,785.76, 205,270.28 and 48,039.60

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Solution

The fourth proportional to 136,785.76, 205,270.28 and 48,039.60 is: 72,091.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,785.76 : 205,270.28 = 48,039.60 : x
  2. Step 2: Convert to fraction form
    136,785.76/205,270.28 = 48,039.60/x
  3. Step 3: Cross multiply
    136,785.76x = 205,270.28 × 48,039.60
  4. Step 4: Simplify right side
    136,785.76x = 9,861,102,143.09
  5. Step 5: Solve for x
    x = 9,861,102,143.09/136,785.76
  6. Step 6: Final answer
    x = 72,091.58

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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.