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Finding the Fourth Proportional to 89,791.28, 134,719.14 and 38,478.40

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Solution

The fourth proportional to 89,791.28, 134,719.14 and 38,478.40 is: 57,731.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,791.28 : 134,719.14 = 38,478.40 : x
  2. Step 2: Convert to fraction form
    89,791.28/134,719.14 = 38,478.40/x
  3. Step 3: Cross multiply
    89,791.28x = 134,719.14 × 38,478.40
  4. Step 4: Simplify right side
    89,791.28x = 5,183,776,956.58
  5. Step 5: Solve for x
    x = 5,183,776,956.58/89,791.28
  6. Step 6: Final answer
    x = 57,731.41

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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.