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Finding the Fourth Proportional to 76,878.72, 114,672.24 and 69,791.76

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Solution

The fourth proportional to 76,878.72, 114,672.24 and 69,791.76 is: 104,101.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,878.72 : 114,672.24 = 69,791.76 : x
  2. Step 2: Convert to fraction form
    76,878.72/114,672.24 = 69,791.76/x
  3. Step 3: Cross multiply
    76,878.72x = 114,672.24 × 69,791.76
  4. Step 4: Simplify right side
    76,878.72x = 8,003,177,452.74
  5. Step 5: Solve for x
    x = 8,003,177,452.74/76,878.72
  6. Step 6: Final answer
    x = 104,101.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.