Home / 100,381.24-138,528.90-57,942.04

Finding the Fourth Proportional to 100,381.24, 138,528.90 and 57,942.04

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Solution

The fourth proportional to 100,381.24, 138,528.90 and 57,942.04 is: 79,961.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,381.24 : 138,528.90 = 57,942.04 : x
  2. Step 2: Convert to fraction form
    100,381.24/138,528.90 = 57,942.04/x
  3. Step 3: Cross multiply
    100,381.24x = 138,528.90 × 57,942.04
  4. Step 4: Simplify right side
    100,381.24x = 8,026,647,064.96
  5. Step 5: Solve for x
    x = 8,026,647,064.96/100,381.24
  6. Step 6: Final answer
    x = 79,961.62

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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.