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Finding the Fourth Proportional to 128,908.80, 193,340.88 and 35,392.68

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Solution

The fourth proportional to 128,908.80, 193,340.88 and 35,392.68 is: 53,082.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,908.80 : 193,340.88 = 35,392.68 : x
  2. Step 2: Convert to fraction form
    128,908.80/193,340.88 = 35,392.68/x
  3. Step 3: Cross multiply
    128,908.80x = 193,340.88 × 35,392.68
  4. Step 4: Simplify right side
    128,908.80x = 6,842,851,896.76
  5. Step 5: Solve for x
    x = 6,842,851,896.76/128,908.80
  6. Step 6: Final answer
    x = 53,082.89

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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.