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Finding the Fourth Proportional to 153,695.25, 212,101.07 and 86,627.25

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Solution

The fourth proportional to 153,695.25, 212,101.07 and 86,627.25 is: 119,546.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,695.25 : 212,101.07 = 86,627.25 : x
  2. Step 2: Convert to fraction form
    153,695.25/212,101.07 = 86,627.25/x
  3. Step 3: Cross multiply
    153,695.25x = 212,101.07 × 86,627.25
  4. Step 4: Simplify right side
    153,695.25x = 18,373,731,983.02
  5. Step 5: Solve for x
    x = 18,373,731,983.02/153,695.25
  6. Step 6: Final answer
    x = 119,546.52

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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.