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Finding the Fourth Proportional to 76,722.10, 114,759.15 and 68,881.30

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Solution

The fourth proportional to 76,722.10, 114,759.15 and 68,881.30 is: 103,031.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,722.10 : 114,759.15 = 68,881.30 : x
  2. Step 2: Convert to fraction form
    76,722.10/114,759.15 = 68,881.30/x
  3. Step 3: Cross multiply
    76,722.10x = 114,759.15 × 68,881.30
  4. Step 4: Simplify right side
    76,722.10x = 7,904,759,438.90
  5. Step 5: Solve for x
    x = 7,904,759,438.90/76,722.10
  6. Step 6: Final answer
    x = 103,031.06

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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.