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Finding the Fourth Proportional to 153,612.33, 211,986.05 and 85,633.62

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Solution

The fourth proportional to 153,612.33, 211,986.05 and 85,633.62 is: 118,174.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,612.33 : 211,986.05 = 85,633.62 : x
  2. Step 2: Convert to fraction form
    153,612.33/211,986.05 = 85,633.62/x
  3. Step 3: Cross multiply
    153,612.33x = 211,986.05 × 85,633.62
  4. Step 4: Simplify right side
    153,612.33x = 18,153,132,851.00
  5. Step 5: Solve for x
    x = 18,153,132,851.00/153,612.33
  6. Step 6: Final answer
    x = 118,174.97

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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.