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Finding the Fourth Proportional to 228,921, 315,895.53 and 126,942.72

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Solution

The fourth proportional to 228,921, 315,895.53 and 126,942.72 is: 175,172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,921 : 315,895.53 = 126,942.72 : x
  2. Step 2: Convert to fraction form
    228,921/315,895.53 = 126,942.72/x
  3. Step 3: Cross multiply
    228,921x = 315,895.53 × 126,942.72
  4. Step 4: Simplify right side
    228,921x = 40,100,637,814.04
  5. Step 5: Solve for x
    x = 40,100,637,814.04/228,921
  6. Step 6: Final answer
    x = 175,172.39

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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.