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Finding the Fourth Proportional to 86,698.80, 129,902.40 and 57,101.40

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Solution

The fourth proportional to 86,698.80, 129,902.40 and 57,101.40 is: 85,556.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,698.80 : 129,902.40 = 57,101.40 : x
  2. Step 2: Convert to fraction form
    86,698.80/129,902.40 = 57,101.40/x
  3. Step 3: Cross multiply
    86,698.80x = 129,902.40 × 57,101.40
  4. Step 4: Simplify right side
    86,698.80x = 7,417,608,903.36
  5. Step 5: Solve for x
    x = 7,417,608,903.36/86,698.80
  6. Step 6: Final answer
    x = 85,556.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.