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Finding the Fourth Proportional to 128,028.86, 176,763.06 and 114,577

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Solution

The fourth proportional to 128,028.86, 176,763.06 and 114,577 is: 158,190.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,028.86 : 176,763.06 = 114,577 : x
  2. Step 2: Convert to fraction form
    128,028.86/176,763.06 = 114,577/x
  3. Step 3: Cross multiply
    128,028.86x = 176,763.06 × 114,577
  4. Step 4: Simplify right side
    128,028.86x = 20,252,981,125.62
  5. Step 5: Solve for x
    x = 20,252,981,125.62/128,028.86
  6. Step 6: Final answer
    x = 158,190.75

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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.