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Finding the Fourth Proportional to 153,115.56, 211,309.04 and 85,147.74

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Solution

The fourth proportional to 153,115.56, 211,309.04 and 85,147.74 is: 117,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,115.56 : 211,309.04 = 85,147.74 : x
  2. Step 2: Convert to fraction form
    153,115.56/211,309.04 = 85,147.74/x
  3. Step 3: Cross multiply
    153,115.56x = 211,309.04 × 85,147.74
  4. Step 4: Simplify right side
    153,115.56x = 17,992,487,410.44
  5. Step 5: Solve for x
    x = 17,992,487,410.44/153,115.56
  6. Step 6: Final answer
    x = 117,509.20

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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.