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Finding the Fourth Proportional to 230,974, 318,744.28 and 124,990

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Solution

The fourth proportional to 230,974, 318,744.28 and 124,990 is: 172,486.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,974 : 318,744.28 = 124,990 : x
  2. Step 2: Convert to fraction form
    230,974/318,744.28 = 124,990/x
  3. Step 3: Cross multiply
    230,974x = 318,744.28 × 124,990
  4. Step 4: Simplify right side
    230,974x = 39,839,847,557.20
  5. Step 5: Solve for x
    x = 39,839,847,557.20/230,974
  6. Step 6: Final answer
    x = 172,486.29

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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.