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Finding the Fourth Proportional to 203,772.70, 305,987.10 and 153,909.10

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Solution

The fourth proportional to 203,772.70, 305,987.10 and 153,909.10 is: 231,111.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,772.70 : 305,987.10 = 153,909.10 : x
  2. Step 2: Convert to fraction form
    203,772.70/305,987.10 = 153,909.10/x
  3. Step 3: Cross multiply
    203,772.70x = 305,987.10 × 153,909.10
  4. Step 4: Simplify right side
    203,772.70x = 47,094,199,172.61
  5. Step 5: Solve for x
    x = 47,094,199,172.61/203,772.70
  6. Step 6: Final answer
    x = 231,111.43

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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.