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Finding the Fourth Proportional to 76,991.86, 106,190.22 and 66,254.83

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Solution

The fourth proportional to 76,991.86, 106,190.22 and 66,254.83 is: 91,381.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,991.86 : 106,190.22 = 66,254.83 : x
  2. Step 2: Convert to fraction form
    76,991.86/106,190.22 = 66,254.83/x
  3. Step 3: Cross multiply
    76,991.86x = 106,190.22 × 66,254.83
  4. Step 4: Simplify right side
    76,991.86x = 7,035,614,973.76
  5. Step 5: Solve for x
    x = 7,035,614,973.76/76,991.86
  6. Step 6: Final answer
    x = 91,381.28

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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.