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Finding the Fourth Proportional to 115,961.60, 160,026.36 and 65,660.60

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Solution

The fourth proportional to 115,961.60, 160,026.36 and 65,660.60 is: 90,611.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,961.60 : 160,026.36 = 65,660.60 : x
  2. Step 2: Convert to fraction form
    115,961.60/160,026.36 = 65,660.60/x
  3. Step 3: Cross multiply
    115,961.60x = 160,026.36 × 65,660.60
  4. Step 4: Simplify right side
    115,961.60x = 10,507,426,813.42
  5. Step 5: Solve for x
    x = 10,507,426,813.42/115,961.60
  6. Step 6: Final answer
    x = 90,611.26

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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.