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Finding the Fourth Proportional to 74,784.50, 103,209.90 and 41,250.50

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Solution

The fourth proportional to 74,784.50, 103,209.90 and 41,250.50 is: 56,929.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,784.50 : 103,209.90 = 41,250.50 : x
  2. Step 2: Convert to fraction form
    74,784.50/103,209.90 = 41,250.50/x
  3. Step 3: Cross multiply
    74,784.50x = 103,209.90 × 41,250.50
  4. Step 4: Simplify right side
    74,784.50x = 4,257,459,979.95
  5. Step 5: Solve for x
    x = 4,257,459,979.95/74,784.50
  6. Step 6: Final answer
    x = 56,929.71

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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.