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Finding the Fourth Proportional to 292,956.80, 439,435.20 and 135,138.56

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Solution

The fourth proportional to 292,956.80, 439,435.20 and 135,138.56 is: 202,707.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,956.80 : 439,435.20 = 135,138.56 : x
  2. Step 2: Convert to fraction form
    292,956.80/439,435.20 = 135,138.56/x
  3. Step 3: Cross multiply
    292,956.80x = 439,435.20 × 135,138.56
  4. Step 4: Simplify right side
    292,956.80x = 59,384,640,141.31
  5. Step 5: Solve for x
    x = 59,384,640,141.31/292,956.80
  6. Step 6: Final answer
    x = 202,707.84

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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.