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Finding the Fourth Proportional to 153,589.32, 211,944.42 and 85,604.04

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Solution

The fourth proportional to 153,589.32, 211,944.42 and 85,604.04 is: 118,128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,589.32 : 211,944.42 = 85,604.04 : x
  2. Step 2: Convert to fraction form
    153,589.32/211,944.42 = 85,604.04/x
  3. Step 3: Cross multiply
    153,589.32x = 211,944.42 × 85,604.04
  4. Step 4: Simplify right side
    153,589.32x = 18,143,298,607.46
  5. Step 5: Solve for x
    x = 18,143,298,607.46/153,589.32
  6. Step 6: Final answer
    x = 118,128.65

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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.