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Finding the Fourth Proportional to 128,804.41, 177,713.73 and 83,484.30

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Solution

The fourth proportional to 128,804.41, 177,713.73 and 83,484.30 is: 115,184.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,804.41 : 177,713.73 = 83,484.30 : x
  2. Step 2: Convert to fraction form
    128,804.41/177,713.73 = 83,484.30/x
  3. Step 3: Cross multiply
    128,804.41x = 177,713.73 × 83,484.30
  4. Step 4: Simplify right side
    128,804.41x = 14,836,307,015.87
  5. Step 5: Solve for x
    x = 14,836,307,015.87/128,804.41
  6. Step 6: Final answer
    x = 115,184.77

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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.