Home / 100,306.80-138,438.12-57,857.04

Finding the Fourth Proportional to 100,306.80, 138,438.12 and 57,857.04

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Solution

The fourth proportional to 100,306.80, 138,438.12 and 57,857.04 is: 79,851.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,306.80 : 138,438.12 = 57,857.04 : x
  2. Step 2: Convert to fraction form
    100,306.80/138,438.12 = 57,857.04/x
  3. Step 3: Cross multiply
    100,306.80x = 138,438.12 × 57,857.04
  4. Step 4: Simplify right side
    100,306.80x = 8,009,619,846.36
  5. Step 5: Solve for x
    x = 8,009,619,846.36/100,306.80
  6. Step 6: Final answer
    x = 79,851.21

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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.