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Finding the Fourth Proportional to 86,592.40, 129,629.40 and 77,261.20

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Solution

The fourth proportional to 86,592.40, 129,629.40 and 77,261.20 is: 115,660.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,592.40 : 129,629.40 = 77,261.20 : x
  2. Step 2: Convert to fraction form
    86,592.40/129,629.40 = 77,261.20/x
  3. Step 3: Cross multiply
    86,592.40x = 129,629.40 × 77,261.20
  4. Step 4: Simplify right side
    86,592.40x = 10,015,322,999.28
  5. Step 5: Solve for x
    x = 10,015,322,999.28/86,592.40
  6. Step 6: Final answer
    x = 115,660.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.