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Finding the Fourth Proportional to 120,990.81, 181,523.13 and 61,868.01

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Solution

The fourth proportional to 120,990.81, 181,523.13 and 61,868.01 is: 92,820.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,990.81 : 181,523.13 = 61,868.01 : x
  2. Step 2: Convert to fraction form
    120,990.81/181,523.13 = 61,868.01/x
  3. Step 3: Cross multiply
    120,990.81x = 181,523.13 × 61,868.01
  4. Step 4: Simplify right side
    120,990.81x = 11,230,474,822.07
  5. Step 5: Solve for x
    x = 11,230,474,822.07/120,990.81
  6. Step 6: Final answer
    x = 92,820.89

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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.