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Finding the Fourth Proportional to 128,591.39, 177,415.08 and 83,304.08

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Solution

The fourth proportional to 128,591.39, 177,415.08 and 83,304.08 is: 114,933.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.39 : 177,415.08 = 83,304.08 : x
  2. Step 2: Convert to fraction form
    128,591.39/177,415.08 = 83,304.08/x
  3. Step 3: Cross multiply
    128,591.39x = 177,415.08 × 83,304.08
  4. Step 4: Simplify right side
    128,591.39x = 14,779,400,017.53
  5. Step 5: Solve for x
    x = 14,779,400,017.53/128,591.39
  6. Step 6: Final answer
    x = 114,933.05

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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.