Home / 123,431.12-170,286.72-71,739.63

Finding the Fourth Proportional to 123,431.12, 170,286.72 and 71,739.63

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Solution

The fourth proportional to 123,431.12, 170,286.72 and 71,739.63 is: 98,972.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,431.12 : 170,286.72 = 71,739.63 : x
  2. Step 2: Convert to fraction form
    123,431.12/170,286.72 = 71,739.63/x
  3. Step 3: Cross multiply
    123,431.12x = 170,286.72 × 71,739.63
  4. Step 4: Simplify right side
    123,431.12x = 12,216,306,488.48
  5. Step 5: Solve for x
    x = 12,216,306,488.48/123,431.12
  6. Step 6: Final answer
    x = 98,972.66

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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.