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Finding the Fourth Proportional to 153,589.62, 211,927.94 and 85,591.68

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Solution

The fourth proportional to 153,589.62, 211,927.94 and 85,591.68 is: 118,102.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,589.62 : 211,927.94 = 85,591.68 : x
  2. Step 2: Convert to fraction form
    153,589.62/211,927.94 = 85,591.68/x
  3. Step 3: Cross multiply
    153,589.62x = 211,927.94 × 85,591.68
  4. Step 4: Simplify right side
    153,589.62x = 18,139,268,423.54
  5. Step 5: Solve for x
    x = 18,139,268,423.54/153,589.62
  6. Step 6: Final answer
    x = 118,102.18

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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.