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Finding the Fourth Proportional to 110,996.56, 153,128.82 and 72,765.28

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Solution

The fourth proportional to 110,996.56, 153,128.82 and 72,765.28 is: 100,385.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,996.56 : 153,128.82 = 72,765.28 : x
  2. Step 2: Convert to fraction form
    110,996.56/153,128.82 = 72,765.28/x
  3. Step 3: Cross multiply
    110,996.56x = 153,128.82 × 72,765.28
  4. Step 4: Simplify right side
    110,996.56x = 11,142,461,463.37
  5. Step 5: Solve for x
    x = 11,142,461,463.37/110,996.56
  6. Step 6: Final answer
    x = 100,385.65

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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.