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Finding the Fourth Proportional to 128,370.63, 177,091.82 and 83,063.24

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Solution

The fourth proportional to 128,370.63, 177,091.82 and 83,063.24 is: 114,588.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,370.63 : 177,091.82 = 83,063.24 : x
  2. Step 2: Convert to fraction form
    128,370.63/177,091.82 = 83,063.24/x
  3. Step 3: Cross multiply
    128,370.63x = 177,091.82 × 83,063.24
  4. Step 4: Simplify right side
    128,370.63x = 14,709,819,045.92
  5. Step 5: Solve for x
    x = 14,709,819,045.92/128,370.63
  6. Step 6: Final answer
    x = 114,588.66

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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.