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Finding the Fourth Proportional to 99,517.58, 137,509.13 and 79,539.33

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Solution

The fourth proportional to 99,517.58, 137,509.13 and 79,539.33 is: 109,904.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,517.58 : 137,509.13 = 79,539.33 : x
  2. Step 2: Convert to fraction form
    99,517.58/137,509.13 = 79,539.33/x
  3. Step 3: Cross multiply
    99,517.58x = 137,509.13 × 79,539.33
  4. Step 4: Simplify right side
    99,517.58x = 10,937,384,069.08
  5. Step 5: Solve for x
    x = 10,937,384,069.08/99,517.58
  6. Step 6: Final answer
    x = 109,904.04

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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.