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Finding the Fourth Proportional to 128,558.39, 177,351.71 and 83,250.96

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Solution

The fourth proportional to 128,558.39, 177,351.71 and 83,250.96 is: 114,848.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,558.39 : 177,351.71 = 83,250.96 : x
  2. Step 2: Convert to fraction form
    128,558.39/177,351.71 = 83,250.96/x
  3. Step 3: Cross multiply
    128,558.39x = 177,351.71 × 83,250.96
  4. Step 4: Simplify right side
    128,558.39x = 14,764,700,822.90
  5. Step 5: Solve for x
    x = 14,764,700,822.90/128,558.39
  6. Step 6: Final answer
    x = 114,848.21

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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.