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Finding the Fourth Proportional to 110,859.71, 166,330.87 and 66,518.28

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Solution

The fourth proportional to 110,859.71, 166,330.87 and 66,518.28 is: 99,802.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,859.71 : 166,330.87 = 66,518.28 : x
  2. Step 2: Convert to fraction form
    110,859.71/166,330.87 = 66,518.28/x
  3. Step 3: Cross multiply
    110,859.71x = 166,330.87 × 66,518.28
  4. Step 4: Simplify right side
    110,859.71x = 11,064,043,217.01
  5. Step 5: Solve for x
    x = 11,064,043,217.01/110,859.71
  6. Step 6: Final answer
    x = 99,802.21

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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.