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Finding the Fourth Proportional to 128,850.48, 177,822.54 and 72,265.50

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Solution

The fourth proportional to 128,850.48, 177,822.54 and 72,265.50 is: 99,731.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,850.48 : 177,822.54 = 72,265.50 : x
  2. Step 2: Convert to fraction form
    128,850.48/177,822.54 = 72,265.50/x
  3. Step 3: Cross multiply
    128,850.48x = 177,822.54 × 72,265.50
  4. Step 4: Simplify right side
    128,850.48x = 12,850,434,764.37
  5. Step 5: Solve for x
    x = 12,850,434,764.37/128,850.48
  6. Step 6: Final answer
    x = 99,731.37

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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.