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Finding the Fourth Proportional to 128,194.96, 192,331.26 and 90,827.32

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Solution

The fourth proportional to 128,194.96, 192,331.26 and 90,827.32 is: 136,268.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,194.96 : 192,331.26 = 90,827.32 : x
  2. Step 2: Convert to fraction form
    128,194.96/192,331.26 = 90,827.32/x
  3. Step 3: Cross multiply
    128,194.96x = 192,331.26 × 90,827.32
  4. Step 4: Simplify right side
    128,194.96x = 17,468,932,898.02
  5. Step 5: Solve for x
    x = 17,468,932,898.02/128,194.96
  6. Step 6: Final answer
    x = 136,268.48

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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.