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Finding the Fourth Proportional to 211,781.76, 317,184.84 and 127,356.72

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Solution

The fourth proportional to 211,781.76, 317,184.84 and 127,356.72 is: 190,741.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,781.76 : 317,184.84 = 127,356.72 : x
  2. Step 2: Convert to fraction form
    211,781.76/317,184.84 = 127,356.72/x
  3. Step 3: Cross multiply
    211,781.76x = 317,184.84 × 127,356.72
  4. Step 4: Simplify right side
    211,781.76x = 40,395,620,856.12
  5. Step 5: Solve for x
    x = 40,395,620,856.12/211,781.76
  6. Step 6: Final answer
    x = 190,741.74

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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.