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Finding the Fourth Proportional to 129,992.86, 194,860.11 and 90,466.93

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Solution

The fourth proportional to 129,992.86, 194,860.11 and 90,466.93 is: 135,610.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,992.86 : 194,860.11 = 90,466.93 : x
  2. Step 2: Convert to fraction form
    129,992.86/194,860.11 = 90,466.93/x
  3. Step 3: Cross multiply
    129,992.86x = 194,860.11 × 90,466.93
  4. Step 4: Simplify right side
    129,992.86x = 17,628,395,931.16
  5. Step 5: Solve for x
    x = 17,628,395,931.16/129,992.86
  6. Step 6: Final answer
    x = 135,610.49

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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.