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Finding the Fourth Proportional to 128,402.88, 192,534.72 and 71,494.32

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Solution

The fourth proportional to 128,402.88, 192,534.72 and 71,494.32 is: 107,202.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,402.88 : 192,534.72 = 71,494.32 : x
  2. Step 2: Convert to fraction form
    128,402.88/192,534.72 = 71,494.32/x
  3. Step 3: Cross multiply
    128,402.88x = 192,534.72 × 71,494.32
  4. Step 4: Simplify right side
    128,402.88x = 13,765,138,882.79
  5. Step 5: Solve for x
    x = 13,765,138,882.79/128,402.88
  6. Step 6: Final answer
    x = 107,202.73

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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.