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Finding the Fourth Proportional to 92,911.20, 128,214.50 and 52,628.68

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Solution

The fourth proportional to 92,911.20, 128,214.50 and 52,628.68 is: 72,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,911.20 : 128,214.50 = 52,628.68 : x
  2. Step 2: Convert to fraction form
    92,911.20/128,214.50 = 52,628.68/x
  3. Step 3: Cross multiply
    92,911.20x = 128,214.50 × 52,628.68
  4. Step 4: Simplify right side
    92,911.20x = 6,747,759,891.86
  5. Step 5: Solve for x
    x = 6,747,759,891.86/92,911.20
  6. Step 6: Final answer
    x = 72,625.90

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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.