Home / 281,336.10-421,937.91-81,603.78

Finding the Fourth Proportional to 281,336.10, 421,937.91 and 81,603.78

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Solution

The fourth proportional to 281,336.10, 421,937.91 and 81,603.78 is: 122,386.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,336.10 : 421,937.91 = 81,603.78 : x
  2. Step 2: Convert to fraction form
    281,336.10/421,937.91 = 81,603.78/x
  3. Step 3: Cross multiply
    281,336.10x = 421,937.91 × 81,603.78
  4. Step 4: Simplify right side
    281,336.10x = 34,431,728,381.30
  5. Step 5: Solve for x
    x = 34,431,728,381.30/281,336.10
  6. Step 6: Final answer
    x = 122,386.46

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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.