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Finding the Fourth Proportional to 128,591.59, 177,415.39 and 83,304.29

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Solution

The fourth proportional to 128,591.59, 177,415.39 and 83,304.29 is: 114,933.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.59 : 177,415.39 = 83,304.29 : x
  2. Step 2: Convert to fraction form
    128,591.59/177,415.39 = 83,304.29/x
  3. Step 3: Cross multiply
    128,591.59x = 177,415.39 × 83,304.29
  4. Step 4: Simplify right side
    128,591.59x = 14,779,463,099.02
  5. Step 5: Solve for x
    x = 14,779,463,099.02/128,591.59
  6. Step 6: Final answer
    x = 114,933.36

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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.