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Finding the Fourth Proportional to 91,101.66, 136,682.73 and 61,440.54

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Solution

The fourth proportional to 91,101.66, 136,682.73 and 61,440.54 is: 92,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,101.66 : 136,682.73 = 61,440.54 : x
  2. Step 2: Convert to fraction form
    91,101.66/136,682.73 = 61,440.54/x
  3. Step 3: Cross multiply
    91,101.66x = 136,682.73 × 61,440.54
  4. Step 4: Simplify right side
    91,101.66x = 8,397,860,739.87
  5. Step 5: Solve for x
    x = 8,397,860,739.87/91,101.66
  6. Step 6: Final answer
    x = 92,181.20

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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.