Home / 281,989.35-389,142.63-154,665.45

Finding the Fourth Proportional to 281,989.35, 389,142.63 and 154,665.45

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Solution

The fourth proportional to 281,989.35, 389,142.63 and 154,665.45 is: 213,436.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,989.35 : 389,142.63 = 154,665.45 : x
  2. Step 2: Convert to fraction form
    281,989.35/389,142.63 = 154,665.45/x
  3. Step 3: Cross multiply
    281,989.35x = 389,142.63 × 154,665.45
  4. Step 4: Simplify right side
    281,989.35x = 60,186,919,983.13
  5. Step 5: Solve for x
    x = 60,186,919,983.13/281,989.35
  6. Step 6: Final answer
    x = 213,436.85

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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.