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Finding the Fourth Proportional to 128,432.93, 177,239.07 and 80,054.39

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Solution

The fourth proportional to 128,432.93, 177,239.07 and 80,054.39 is: 110,476.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,432.93 : 177,239.07 = 80,054.39 : x
  2. Step 2: Convert to fraction form
    128,432.93/177,239.07 = 80,054.39/x
  3. Step 3: Cross multiply
    128,432.93x = 177,239.07 × 80,054.39
  4. Step 4: Simplify right side
    128,432.93x = 14,188,766,076.12
  5. Step 5: Solve for x
    x = 14,188,766,076.12/128,432.93
  6. Step 6: Final answer
    x = 110,476.08

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1.5x scale

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.