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Finding the Fourth Proportional to 128,008.56, 191,995.92 and 38,049.42

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Solution

The fourth proportional to 128,008.56, 191,995.92 and 38,049.42 is: 57,069.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,008.56 : 191,995.92 = 38,049.42 : x
  2. Step 2: Convert to fraction form
    128,008.56/191,995.92 = 38,049.42/x
  3. Step 3: Cross multiply
    128,008.56x = 191,995.92 × 38,049.42
  4. Step 4: Simplify right side
    128,008.56x = 7,305,333,398.37
  5. Step 5: Solve for x
    x = 7,305,333,398.37/128,008.56
  6. Step 6: Final answer
    x = 57,069.10

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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.