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Finding the Fourth Proportional to 123,502.45, 170,431.16 and 69,786.31

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Solution

The fourth proportional to 123,502.45, 170,431.16 and 69,786.31 is: 96,303.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,502.45 : 170,431.16 = 69,786.31 : x
  2. Step 2: Convert to fraction form
    123,502.45/170,431.16 = 69,786.31/x
  3. Step 3: Cross multiply
    123,502.45x = 170,431.16 × 69,786.31
  4. Step 4: Simplify right side
    123,502.45x = 11,893,761,765.42
  5. Step 5: Solve for x
    x = 11,893,761,765.42/123,502.45
  6. Step 6: Final answer
    x = 96,303.85

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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.