Home / 100,145.32-138,198.18-57,727.72

Finding the Fourth Proportional to 100,145.32, 138,198.18 and 57,727.72

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Solution

The fourth proportional to 100,145.32, 138,198.18 and 57,727.72 is: 79,662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,145.32 : 138,198.18 = 57,727.72 : x
  2. Step 2: Convert to fraction form
    100,145.32/138,198.18 = 57,727.72/x
  3. Step 3: Cross multiply
    100,145.32x = 138,198.18 × 57,727.72
  4. Step 4: Simplify right side
    100,145.32x = 7,977,865,839.55
  5. Step 5: Solve for x
    x = 7,977,865,839.55/100,145.32
  6. Step 6: Final answer
    x = 79,662.89

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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.