Home / 123,633.12-185,389.20-86,211.12

Finding the Fourth Proportional to 123,633.12, 185,389.20 and 86,211.12

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Solution

The fourth proportional to 123,633.12, 185,389.20 and 86,211.12 is: 129,274.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,633.12 : 185,389.20 = 86,211.12 : x
  2. Step 2: Convert to fraction form
    123,633.12/185,389.20 = 86,211.12/x
  3. Step 3: Cross multiply
    123,633.12x = 185,389.20 × 86,211.12
  4. Step 4: Simplify right side
    123,633.12x = 15,982,610,567.90
  5. Step 5: Solve for x
    x = 15,982,610,567.90/123,633.12
  6. Step 6: Final answer
    x = 129,274.51

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1.5x scale

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.