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Finding the Fourth Proportional to 115,954.20, 160,009.18 and 65,656.60

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Solution

The fourth proportional to 115,954.20, 160,009.18 and 65,656.60 is: 90,601.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,954.20 : 160,009.18 = 65,656.60 : x
  2. Step 2: Convert to fraction form
    115,954.20/160,009.18 = 65,656.60/x
  3. Step 3: Cross multiply
    115,954.20x = 160,009.18 × 65,656.60
  4. Step 4: Simplify right side
    115,954.20x = 10,505,658,727.59
  5. Step 5: Solve for x
    x = 10,505,658,727.59/115,954.20
  6. Step 6: Final answer
    x = 90,601.80

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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.