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Finding the Fourth Proportional to 76,961, 115,107.96 and 45,295.58

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Solution

The fourth proportional to 76,961, 115,107.96 and 45,295.58 is: 67,747.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,961 : 115,107.96 = 45,295.58 : x
  2. Step 2: Convert to fraction form
    76,961/115,107.96 = 45,295.58/x
  3. Step 3: Cross multiply
    76,961x = 115,107.96 × 45,295.58
  4. Step 4: Simplify right side
    76,961x = 5,213,881,810.82
  5. Step 5: Solve for x
    x = 5,213,881,810.82/76,961
  6. Step 6: Final answer
    x = 67,747.06

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1.5x scale

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.