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Finding the Fourth Proportional to 228,618.46, 315,489.35 and 126,643.61

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Solution

The fourth proportional to 228,618.46, 315,489.35 and 126,643.61 is: 174,765.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,618.46 : 315,489.35 = 126,643.61 : x
  2. Step 2: Convert to fraction form
    228,618.46/315,489.35 = 126,643.61/x
  3. Step 3: Cross multiply
    228,618.46x = 315,489.35 × 126,643.61
  4. Step 4: Simplify right side
    228,618.46x = 39,954,709,973.34
  5. Step 5: Solve for x
    x = 39,954,709,973.34/228,618.46
  6. Step 6: Final answer
    x = 174,765.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.