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Finding the Fourth Proportional to 91,361.94, 126,078.89 and 51,075.51

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Solution

The fourth proportional to 91,361.94, 126,078.89 and 51,075.51 is: 70,483.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,361.94 : 126,078.89 = 51,075.51 : x
  2. Step 2: Convert to fraction form
    91,361.94/126,078.89 = 51,075.51/x
  3. Step 3: Cross multiply
    91,361.94x = 126,078.89 × 51,075.51
  4. Step 4: Simplify right side
    91,361.94x = 6,439,543,606.98
  5. Step 5: Solve for x
    x = 6,439,543,606.98/91,361.94
  6. Step 6: Final answer
    x = 70,483.88

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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.