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Finding the Fourth Proportional to 163,256.80, 225,317.12 and 90,676

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Solution

The fourth proportional to 163,256.80, 225,317.12 and 90,676 is: 125,145.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,256.80 : 225,317.12 = 90,676 : x
  2. Step 2: Convert to fraction form
    163,256.80/225,317.12 = 90,676/x
  3. Step 3: Cross multiply
    163,256.80x = 225,317.12 × 90,676
  4. Step 4: Simplify right side
    163,256.80x = 20,430,855,173.12
  5. Step 5: Solve for x
    x = 20,430,855,173.12/163,256.80
  6. Step 6: Final answer
    x = 125,145.51

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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.