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Finding the Fourth Proportional to 66,353.80, 99,530.70 and 61,979.80

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Solution

The fourth proportional to 66,353.80, 99,530.70 and 61,979.80 is: 92,969.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,353.80 : 99,530.70 = 61,979.80 : x
  2. Step 2: Convert to fraction form
    66,353.80/99,530.70 = 61,979.80/x
  3. Step 3: Cross multiply
    66,353.80x = 99,530.70 × 61,979.80
  4. Step 4: Simplify right side
    66,353.80x = 6,168,892,879.86
  5. Step 5: Solve for x
    x = 6,168,892,879.86/66,353.80
  6. Step 6: Final answer
    x = 92,969.70

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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.