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Finding the Fourth Proportional to 427,529.16, 641,208.81 and 123,958.98

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Solution

The fourth proportional to 427,529.16, 641,208.81 and 123,958.98 is: 185,913.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,529.16 : 641,208.81 = 123,958.98 : x
  2. Step 2: Convert to fraction form
    427,529.16/641,208.81 = 123,958.98/x
  3. Step 3: Cross multiply
    427,529.16x = 641,208.81 × 123,958.98
  4. Step 4: Simplify right side
    427,529.16x = 79,483,590,054.61
  5. Step 5: Solve for x
    x = 79,483,590,054.61/427,529.16
  6. Step 6: Final answer
    x = 185,913.85

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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.