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Finding the Fourth Proportional to 158,728.80, 238,090.11 and 38,786.55

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Solution

The fourth proportional to 158,728.80, 238,090.11 and 38,786.55 is: 58,179.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,728.80 : 238,090.11 = 38,786.55 : x
  2. Step 2: Convert to fraction form
    158,728.80/238,090.11 = 38,786.55/x
  3. Step 3: Cross multiply
    158,728.80x = 238,090.11 × 38,786.55
  4. Step 4: Simplify right side
    158,728.80x = 9,234,693,956.02
  5. Step 5: Solve for x
    x = 9,234,693,956.02/158,728.80
  6. Step 6: Final answer
    x = 58,179.07

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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.