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Finding the Fourth Proportional to 238,720.28, 358,103.79 and 86,958.59

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Solution

The fourth proportional to 238,720.28, 358,103.79 and 86,958.59 is: 130,446.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,720.28 : 358,103.79 = 86,958.59 : x
  2. Step 2: Convert to fraction form
    238,720.28/358,103.79 = 86,958.59/x
  3. Step 3: Cross multiply
    238,720.28x = 358,103.79 × 86,958.59
  4. Step 4: Simplify right side
    238,720.28x = 31,140,202,471.12
  5. Step 5: Solve for x
    x = 31,140,202,471.12/238,720.28
  6. Step 6: Final answer
    x = 130,446.41

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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.