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Finding the Fourth Proportional to 103,673.46, 155,321.56 and 72,016.64

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Solution

The fourth proportional to 103,673.46, 155,321.56 and 72,016.64 is: 107,893.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,673.46 : 155,321.56 = 72,016.64 : x
  2. Step 2: Convert to fraction form
    103,673.46/155,321.56 = 72,016.64/x
  3. Step 3: Cross multiply
    103,673.46x = 155,321.56 × 72,016.64
  4. Step 4: Simplify right side
    103,673.46x = 11,185,736,870.76
  5. Step 5: Solve for x
    x = 11,185,736,870.76/103,673.46
  6. Step 6: Final answer
    x = 107,893.93

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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.