Home / 128,538,517.89-177,504,218.73-89,487,076.80

Finding the Fourth Proportional to 128,538,517.89, 177,504,218.73 and 89,487,076.80

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Solution

The fourth proportional to 128,538,517.89, 177,504,218.73 and 89,487,076.80 is: 123,576,449.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,538,517.89 : 177,504,218.73 = 89,487,076.80 : x
  2. Step 2: Convert to fraction form
    128,538,517.89/177,504,218.73 = 89,487,076.80/x
  3. Step 3: Cross multiply
    128,538,517.89x = 177,504,218.73 × 89,487,076.80
  4. Step 4: Simplify right side
    128,538,517.89x = 15,884,333,653,815,506
  5. Step 5: Solve for x
    x = 15,884,333,653,815,506/128,538,517.89
  6. Step 6: Final answer
    x = 123,576,449.41

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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.