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Finding the Fourth Proportional to 228,690.88, 315,567.25 and 126,690.87

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Solution

The fourth proportional to 228,690.88, 315,567.25 and 126,690.87 is: 174,818.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,690.88 : 315,567.25 = 126,690.87 : x
  2. Step 2: Convert to fraction form
    228,690.88/315,567.25 = 126,690.87/x
  3. Step 3: Cross multiply
    228,690.88x = 315,567.25 × 126,690.87
  4. Step 4: Simplify right side
    228,690.88x = 39,979,489,446.01
  5. Step 5: Solve for x
    x = 39,979,489,446.01/228,690.88
  6. Step 6: Final answer
    x = 174,818.91

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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.