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Finding the Fourth Proportional to 137,800.80, 190,114.08 and 86,799.84

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Solution

The fourth proportional to 137,800.80, 190,114.08 and 86,799.84 is: 119,751.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,800.80 : 190,114.08 = 86,799.84 : x
  2. Step 2: Convert to fraction form
    137,800.80/190,114.08 = 86,799.84/x
  3. Step 3: Cross multiply
    137,800.80x = 190,114.08 × 86,799.84
  4. Step 4: Simplify right side
    137,800.80x = 16,501,871,725.75
  5. Step 5: Solve for x
    x = 16,501,871,725.75/137,800.80
  6. Step 6: Final answer
    x = 119,751.64

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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.