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Finding the Fourth Proportional to 203,134.70, 280,322.42 and 112,488.72

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Solution

The fourth proportional to 203,134.70, 280,322.42 and 112,488.72 is: 155,232.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,134.70 : 280,322.42 = 112,488.72 : x
  2. Step 2: Convert to fraction form
    203,134.70/280,322.42 = 112,488.72/x
  3. Step 3: Cross multiply
    203,134.70x = 280,322.42 × 112,488.72
  4. Step 4: Simplify right side
    203,134.70x = 31,533,110,213.10
  5. Step 5: Solve for x
    x = 31,533,110,213.10/203,134.70
  6. Step 6: Final answer
    x = 155,232.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.