Home / 281,315.45-421,862-91,729.21

Finding the Fourth Proportional to 281,315.45, 421,862 and 91,729.21

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Solution

The fourth proportional to 281,315.45, 421,862 and 91,729.21 is: 137,557.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,315.45 : 421,862 = 91,729.21 : x
  2. Step 2: Convert to fraction form
    281,315.45/421,862 = 91,729.21/x
  3. Step 3: Cross multiply
    281,315.45x = 421,862 × 91,729.21
  4. Step 4: Simplify right side
    281,315.45x = 38,697,067,989.02
  5. Step 5: Solve for x
    x = 38,697,067,989.02/281,315.45
  6. Step 6: Final answer
    x = 137,557.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.