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Finding the Fourth Proportional to 104,969.13, 144,909.11 and 72,728.19

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Solution

The fourth proportional to 104,969.13, 144,909.11 and 72,728.19 is: 100,400.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,969.13 : 144,909.11 = 72,728.19 : x
  2. Step 2: Convert to fraction form
    104,969.13/144,909.11 = 72,728.19/x
  3. Step 3: Cross multiply
    104,969.13x = 144,909.11 × 72,728.19
  4. Step 4: Simplify right side
    104,969.13x = 10,538,977,284.81
  5. Step 5: Solve for x
    x = 10,538,977,284.81/104,969.13
  6. Step 6: Final answer
    x = 100,400.73

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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.