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Finding the Fourth Proportional to 228,959.85, 315,923.85 and 138,255.03

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Solution

The fourth proportional to 228,959.85, 315,923.85 and 138,255.03 is: 190,767.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,959.85 : 315,923.85 = 138,255.03 : x
  2. Step 2: Convert to fraction form
    228,959.85/315,923.85 = 138,255.03/x
  3. Step 3: Cross multiply
    228,959.85x = 315,923.85 × 138,255.03
  4. Step 4: Simplify right side
    228,959.85x = 43,678,061,359.47
  5. Step 5: Solve for x
    x = 43,678,061,359.47/228,959.85
  6. Step 6: Final answer
    x = 190,767.34

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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.