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Finding the Fourth Proportional to 101,293.74, 139,804.70 and 66,777.90

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Solution

The fourth proportional to 101,293.74, 139,804.70 and 66,777.90 is: 92,166.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,293.74 : 139,804.70 = 66,777.90 : x
  2. Step 2: Convert to fraction form
    101,293.74/139,804.70 = 66,777.90/x
  3. Step 3: Cross multiply
    101,293.74x = 139,804.70 × 66,777.90
  4. Step 4: Simplify right side
    101,293.74x = 9,335,863,942.24
  5. Step 5: Solve for x
    x = 9,335,863,942.24/101,293.74
  6. Step 6: Final answer
    x = 92,166.25

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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.