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Finding the Fourth Proportional to 76,778.01, 105,891.00 and 64,465.88

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Solution

The fourth proportional to 76,778.01, 105,891.00 and 64,465.88 is: 88,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,778.01 : 105,891.00 = 64,465.88 : x
  2. Step 2: Convert to fraction form
    76,778.01/105,891.00 = 64,465.88/x
  3. Step 3: Cross multiply
    76,778.01x = 105,891.00 × 64,465.88
  4. Step 4: Simplify right side
    76,778.01x = 6,826,355,727.88
  5. Step 5: Solve for x
    x = 6,826,355,727.88/76,778.01
  6. Step 6: Final answer
    x = 88,910.30

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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.