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Finding the Fourth Proportional to 66,200.60, 91,347.80 and 39,333.30

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Solution

The fourth proportional to 66,200.60, 91,347.80 and 39,333.30 is: 54,274.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,200.60 : 91,347.80 = 39,333.30 : x
  2. Step 2: Convert to fraction form
    66,200.60/91,347.80 = 39,333.30/x
  3. Step 3: Cross multiply
    66,200.60x = 91,347.80 × 39,333.30
  4. Step 4: Simplify right side
    66,200.60x = 3,593,010,421.74
  5. Step 5: Solve for x
    x = 3,593,010,421.74/66,200.60
  6. Step 6: Final answer
    x = 54,274.59

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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.