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Finding the Fourth Proportional to 225,513.72, 338,139.18 and 85,283.28

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Solution

The fourth proportional to 225,513.72, 338,139.18 and 85,283.28 is: 127,875.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,513.72 : 338,139.18 = 85,283.28 : x
  2. Step 2: Convert to fraction form
    225,513.72/338,139.18 = 85,283.28/x
  3. Step 3: Cross multiply
    225,513.72x = 338,139.18 × 85,283.28
  4. Step 4: Simplify right side
    225,513.72x = 28,837,618,366.91
  5. Step 5: Solve for x
    x = 28,837,618,366.91/225,513.72
  6. Step 6: Final answer
    x = 127,875.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.