Home / 120,529.12-180,277.04-86,871.20

Finding the Fourth Proportional to 120,529.12, 180,277.04 and 86,871.20

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Solution

The fourth proportional to 120,529.12, 180,277.04 and 86,871.20 is: 129,934.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,529.12 : 180,277.04 = 86,871.20 : x
  2. Step 2: Convert to fraction form
    120,529.12/180,277.04 = 86,871.20/x
  3. Step 3: Cross multiply
    120,529.12x = 180,277.04 × 86,871.20
  4. Step 4: Simplify right side
    120,529.12x = 15,660,882,797.25
  5. Step 5: Solve for x
    x = 15,660,882,797.25/120,529.12
  6. Step 6: Final answer
    x = 129,934.43

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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.