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Finding the Fourth Proportional to 80,165.60, 111,095.60 and 79,038.08

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Solution

The fourth proportional to 80,165.60, 111,095.60 and 79,038.08 is: 109,533.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,165.60 : 111,095.60 = 79,038.08 : x
  2. Step 2: Convert to fraction form
    80,165.60/111,095.60 = 79,038.08/x
  3. Step 3: Cross multiply
    80,165.60x = 111,095.60 × 79,038.08
  4. Step 4: Simplify right side
    80,165.60x = 8,780,782,920.45
  5. Step 5: Solve for x
    x = 8,780,782,920.45/80,165.60
  6. Step 6: Final answer
    x = 109,533.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.