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Finding the Fourth Proportional to 76,999.77, 106,012.67 and 67,059.45

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Solution

The fourth proportional to 76,999.77, 106,012.67 and 67,059.45 is: 92,326.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,999.77 : 106,012.67 = 67,059.45 : x
  2. Step 2: Convert to fraction form
    76,999.77/106,012.67 = 67,059.45/x
  3. Step 3: Cross multiply
    76,999.77x = 106,012.67 × 67,059.45
  4. Step 4: Simplify right side
    76,999.77x = 7,109,151,007.93
  5. Step 5: Solve for x
    x = 7,109,151,007.93/76,999.77
  6. Step 6: Final answer
    x = 92,326.91

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1.5x scale

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.