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Finding the Fourth Proportional to 86,903.12, 119,864.41 and 79,756.08

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Solution

The fourth proportional to 86,903.12, 119,864.41 and 79,756.08 is: 110,006.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,903.12 : 119,864.41 = 79,756.08 : x
  2. Step 2: Convert to fraction form
    86,903.12/119,864.41 = 79,756.08/x
  3. Step 3: Cross multiply
    86,903.12x = 119,864.41 × 79,756.08
  4. Step 4: Simplify right side
    86,903.12x = 9,559,915,074.33
  5. Step 5: Solve for x
    x = 9,559,915,074.33/86,903.12
  6. Step 6: Final answer
    x = 110,006.59

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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.