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Finding the Fourth Proportional to 228,689.88, 315,565.88 and 126,689.87

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Solution

The fourth proportional to 228,689.88, 315,565.88 and 126,689.87 is: 174,817.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,689.88 : 315,565.88 = 126,689.87 : x
  2. Step 2: Convert to fraction form
    228,689.88/315,565.88 = 126,689.87/x
  3. Step 3: Cross multiply
    228,689.88x = 315,565.88 × 126,689.87
  4. Step 4: Simplify right side
    228,689.88x = 39,979,000,469.10
  5. Step 5: Solve for x
    x = 39,979,000,469.10/228,689.88
  6. Step 6: Final answer
    x = 174,817.53

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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.