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Finding the Fourth Proportional to 91,200.80, 136,887.60 and 56,208.80

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Solution

The fourth proportional to 91,200.80, 136,887.60 and 56,208.80 is: 84,366.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,200.80 : 136,887.60 = 56,208.80 : x
  2. Step 2: Convert to fraction form
    91,200.80/136,887.60 = 56,208.80/x
  3. Step 3: Cross multiply
    91,200.80x = 136,887.60 × 56,208.80
  4. Step 4: Simplify right side
    91,200.80x = 7,694,287,730.88
  5. Step 5: Solve for x
    x = 7,694,287,730.88/91,200.80
  6. Step 6: Final answer
    x = 84,366.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.