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Finding the Fourth Proportional to 128,847.72, 177,832.08 and 75,164.16

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Solution

The fourth proportional to 128,847.72, 177,832.08 and 75,164.16 is: 103,739.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,847.72 : 177,832.08 = 75,164.16 : x
  2. Step 2: Convert to fraction form
    128,847.72/177,832.08 = 75,164.16/x
  3. Step 3: Cross multiply
    128,847.72x = 177,832.08 × 75,164.16
  4. Step 4: Simplify right side
    128,847.72x = 13,366,598,914.25
  5. Step 5: Solve for x
    x = 13,366,598,914.25/128,847.72
  6. Step 6: Final answer
    x = 103,739.51

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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.