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Finding the Fourth Proportional to 228,969.52, 315,979.72 and 126,989.30

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Solution

The fourth proportional to 228,969.52, 315,979.72 and 126,989.30 is: 175,246.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,969.52 : 315,979.72 = 126,989.30 : x
  2. Step 2: Convert to fraction form
    228,969.52/315,979.72 = 126,989.30/x
  3. Step 3: Cross multiply
    228,969.52x = 315,979.72 × 126,989.30
  4. Step 4: Simplify right side
    228,969.52x = 40,126,043,929.47
  5. Step 5: Solve for x
    x = 40,126,043,929.47/228,969.52
  6. Step 6: Final answer
    x = 175,246.23

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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.