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Finding the Fourth Proportional to 228,668.48, 315,562.56 and 128,067.20

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Solution

The fourth proportional to 228,668.48, 315,562.56 and 128,067.20 is: 176,732.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,668.48 : 315,562.56 = 128,067.20 : x
  2. Step 2: Convert to fraction form
    228,668.48/315,562.56 = 128,067.20/x
  3. Step 3: Cross multiply
    228,668.48x = 315,562.56 × 128,067.20
  4. Step 4: Simplify right side
    228,668.48x = 40,413,213,484.03
  5. Step 5: Solve for x
    x = 40,413,213,484.03/228,668.48
  6. Step 6: Final answer
    x = 176,732.77

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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.