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Finding the Fourth Proportional to 128,066.62, 176,744.48 and 74,348.43

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Solution

The fourth proportional to 128,066.62, 176,744.48 and 74,348.43 is: 102,608.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,066.62 : 176,744.48 = 74,348.43 : x
  2. Step 2: Convert to fraction form
    128,066.62/176,744.48 = 74,348.43/x
  3. Step 3: Cross multiply
    128,066.62x = 176,744.48 × 74,348.43
  4. Step 4: Simplify right side
    128,066.62x = 13,140,674,977.03
  5. Step 5: Solve for x
    x = 13,140,674,977.03/128,066.62
  6. Step 6: Final answer
    x = 102,608.12

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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.