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Finding the Fourth Proportional to 135,864.72, 203,719.32 and 56,912.40

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Solution

The fourth proportional to 135,864.72, 203,719.32 and 56,912.40 is: 85,336.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,864.72 : 203,719.32 = 56,912.40 : x
  2. Step 2: Convert to fraction form
    135,864.72/203,719.32 = 56,912.40/x
  3. Step 3: Cross multiply
    135,864.72x = 203,719.32 × 56,912.40
  4. Step 4: Simplify right side
    135,864.72x = 11,594,155,427.57
  5. Step 5: Solve for x
    x = 11,594,155,427.57/135,864.72
  6. Step 6: Final answer
    x = 85,336.03

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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.