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Finding the Fourth Proportional to 66,193.50, 91,346.86 and 35,978.74

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Solution

The fourth proportional to 66,193.50, 91,346.86 and 35,978.74 is: 49,650.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,193.50 : 91,346.86 = 35,978.74 : x
  2. Step 2: Convert to fraction form
    66,193.50/91,346.86 = 35,978.74/x
  3. Step 3: Cross multiply
    66,193.50x = 91,346.86 × 35,978.74
  4. Step 4: Simplify right side
    66,193.50x = 3,286,544,925.76
  5. Step 5: Solve for x
    x = 3,286,544,925.76/66,193.50
  6. Step 6: Final answer
    x = 49,650.57

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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.