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Finding the Fourth Proportional to 228,909.69, 315,879.96 and 126,931.40

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Solution

The fourth proportional to 228,909.69, 315,879.96 and 126,931.40 is: 175,156.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,909.69 : 315,879.96 = 126,931.40 : x
  2. Step 2: Convert to fraction form
    228,909.69/315,879.96 = 126,931.40/x
  3. Step 3: Cross multiply
    228,909.69x = 315,879.96 × 126,931.40
  4. Step 4: Simplify right side
    228,909.69x = 40,095,085,554.74
  5. Step 5: Solve for x
    x = 40,095,085,554.74/228,909.69
  6. Step 6: Final answer
    x = 175,156.79

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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.