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Finding the Fourth Proportional to 90,666.54, 135,884.65 and 51,245.82

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Solution

The fourth proportional to 90,666.54, 135,884.65 and 51,245.82 is: 76,803.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,666.54 : 135,884.65 = 51,245.82 : x
  2. Step 2: Convert to fraction form
    90,666.54/135,884.65 = 51,245.82/x
  3. Step 3: Cross multiply
    90,666.54x = 135,884.65 × 51,245.82
  4. Step 4: Simplify right side
    90,666.54x = 6,963,520,314.66
  5. Step 5: Solve for x
    x = 6,963,520,314.66/90,666.54
  6. Step 6: Final answer
    x = 76,803.64

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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.