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Finding the Fourth Proportional to 270,607.02, 405,902.16 and 128,554.56

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Solution

The fourth proportional to 270,607.02, 405,902.16 and 128,554.56 is: 192,827.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,607.02 : 405,902.16 = 128,554.56 : x
  2. Step 2: Convert to fraction form
    270,607.02/405,902.16 = 128,554.56/x
  3. Step 3: Cross multiply
    270,607.02x = 405,902.16 × 128,554.56
  4. Step 4: Simplify right side
    270,607.02x = 52,180,573,581.85
  5. Step 5: Solve for x
    x = 52,180,573,581.85/270,607.02
  6. Step 6: Final answer
    x = 192,827.86

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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.