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Finding the Fourth Proportional to 228,633.79, 315,514.57 and 126,665.89

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Solution

The fourth proportional to 228,633.79, 315,514.57 and 126,665.89 is: 174,798.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,633.79 : 315,514.57 = 126,665.89 : x
  2. Step 2: Convert to fraction form
    228,633.79/315,514.57 = 126,665.89/x
  3. Step 3: Cross multiply
    228,633.79x = 315,514.57 × 126,665.89
  4. Step 4: Simplify right side
    228,633.79x = 39,964,933,817.02
  5. Step 5: Solve for x
    x = 39,964,933,817.02/228,633.79
  6. Step 6: Final answer
    x = 174,798.89

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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.