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Finding the Fourth Proportional to 203,459.88, 305,131.50 and 61,318.92

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Solution

The fourth proportional to 203,459.88, 305,131.50 and 61,318.92 is: 91,960.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,459.88 : 305,131.50 = 61,318.92 : x
  2. Step 2: Convert to fraction form
    203,459.88/305,131.50 = 61,318.92/x
  3. Step 3: Cross multiply
    203,459.88x = 305,131.50 × 61,318.92
  4. Step 4: Simplify right side
    203,459.88x = 18,710,334,037.98
  5. Step 5: Solve for x
    x = 18,710,334,037.98/203,459.88
  6. Step 6: Final answer
    x = 91,960.80

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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.