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Finding the Fourth Proportional to 128,805.93, 177,735.26 and 71,444.57

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Solution

The fourth proportional to 128,805.93, 177,735.26 and 71,444.57 is: 98,584.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,805.93 : 177,735.26 = 71,444.57 : x
  2. Step 2: Convert to fraction form
    128,805.93/177,735.26 = 71,444.57/x
  3. Step 3: Cross multiply
    128,805.93x = 177,735.26 × 71,444.57
  4. Step 4: Simplify right side
    128,805.93x = 12,698,218,514.47
  5. Step 5: Solve for x
    x = 12,698,218,514.47/128,805.93
  6. Step 6: Final answer
    x = 98,584.11

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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.