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Finding the Fourth Proportional to 128,528.32, 192,786.80 and 35,034.08

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Solution

The fourth proportional to 128,528.32, 192,786.80 and 35,034.08 is: 52,549.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,528.32 : 192,786.80 = 35,034.08 : x
  2. Step 2: Convert to fraction form
    128,528.32/192,786.80 = 35,034.08/x
  3. Step 3: Cross multiply
    128,528.32x = 192,786.80 × 35,034.08
  4. Step 4: Simplify right side
    128,528.32x = 6,754,108,174.14
  5. Step 5: Solve for x
    x = 6,754,108,174.14/128,528.32
  6. Step 6: Final answer
    x = 52,549.57

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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.