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Finding the Fourth Proportional to 163,390.10, 225,473.84 and 90,791.12

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Solution

The fourth proportional to 163,390.10, 225,473.84 and 90,791.12 is: 125,289.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,390.10 : 225,473.84 = 90,791.12 : x
  2. Step 2: Convert to fraction form
    163,390.10/225,473.84 = 90,791.12/x
  3. Step 3: Cross multiply
    163,390.10x = 225,473.84 × 90,791.12
  4. Step 4: Simplify right side
    163,390.10x = 20,471,020,882.98
  5. Step 5: Solve for x
    x = 20,471,020,882.98/163,390.10
  6. Step 6: Final answer
    x = 125,289.24

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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.