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Finding the Fourth Proportional to 117,311.84, 161,852.28 and 66,319.64

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Solution

The fourth proportional to 117,311.84, 161,852.28 and 66,319.64 is: 91,499.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,311.84 : 161,852.28 = 66,319.64 : x
  2. Step 2: Convert to fraction form
    117,311.84/161,852.28 = 66,319.64/x
  3. Step 3: Cross multiply
    117,311.84x = 161,852.28 × 66,319.64
  4. Step 4: Simplify right side
    117,311.84x = 10,733,984,942.78
  5. Step 5: Solve for x
    x = 10,733,984,942.78/117,311.84
  6. Step 6: Final answer
    x = 91,499.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.