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Finding the Fourth Proportional to 228,909.19, 315,879.27 and 126,930.90

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Solution

The fourth proportional to 228,909.19, 315,879.27 and 126,930.90 is: 175,156.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,909.19 : 315,879.27 = 126,930.90 : x
  2. Step 2: Convert to fraction form
    228,909.19/315,879.27 = 126,930.90/x
  3. Step 3: Cross multiply
    228,909.19x = 315,879.27 × 126,930.90
  4. Step 4: Simplify right side
    228,909.19x = 40,094,839,321.17
  5. Step 5: Solve for x
    x = 40,094,839,321.17/228,909.19
  6. Step 6: Final answer
    x = 175,156.09

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1.5x scale

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.