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Finding the Fourth Proportional to 120,907.80, 181,361.70 and 92,881.80

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Solution

The fourth proportional to 120,907.80, 181,361.70 and 92,881.80 is: 139,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,907.80 : 181,361.70 = 92,881.80 : x
  2. Step 2: Convert to fraction form
    120,907.80/181,361.70 = 92,881.80/x
  3. Step 3: Cross multiply
    120,907.80x = 181,361.70 × 92,881.80
  4. Step 4: Simplify right side
    120,907.80x = 16,845,201,147.06
  5. Step 5: Solve for x
    x = 16,845,201,147.06/120,907.80
  6. Step 6: Final answer
    x = 139,322.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.