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Finding the Fourth Proportional to 129,325.32, 193,918.73 and 57,212.64

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Solution

The fourth proportional to 129,325.32, 193,918.73 and 57,212.64 is: 85,788.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,325.32 : 193,918.73 = 57,212.64 : x
  2. Step 2: Convert to fraction form
    129,325.32/193,918.73 = 57,212.64/x
  3. Step 3: Cross multiply
    129,325.32x = 193,918.73 × 57,212.64
  4. Step 4: Simplify right side
    129,325.32x = 11,094,602,202.68
  5. Step 5: Solve for x
    x = 11,094,602,202.68/129,325.32
  6. Step 6: Final answer
    x = 85,788.32

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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.