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Finding the Fourth Proportional to 153,693.25, 212,098.31 and 86,625.25

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Solution

The fourth proportional to 153,693.25, 212,098.31 and 86,625.25 is: 119,543.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,693.25 : 212,098.31 = 86,625.25 : x
  2. Step 2: Convert to fraction form
    153,693.25/212,098.31 = 86,625.25/x
  3. Step 3: Cross multiply
    153,693.25x = 212,098.31 × 86,625.25
  4. Step 4: Simplify right side
    153,693.25x = 18,373,069,128.33
  5. Step 5: Solve for x
    x = 18,373,069,128.33/153,693.25
  6. Step 6: Final answer
    x = 119,543.76

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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.