Home / 90,145.12-124,399.20-49,855.72

Finding the Fourth Proportional to 90,145.12, 124,399.20 and 49,855.72

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Solution

The fourth proportional to 90,145.12, 124,399.20 and 49,855.72 is: 68,800.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,145.12 : 124,399.20 = 49,855.72 : x
  2. Step 2: Convert to fraction form
    90,145.12/124,399.20 = 49,855.72/x
  3. Step 3: Cross multiply
    90,145.12x = 124,399.20 × 49,855.72
  4. Step 4: Simplify right side
    90,145.12x = 6,202,011,683.42
  5. Step 5: Solve for x
    x = 6,202,011,683.42/90,145.12
  6. Step 6: Final answer
    x = 68,800.30

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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.