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Finding the Fourth Proportional to 72,459.36, 108,799.20 and 68,895.36

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Solution

The fourth proportional to 72,459.36, 108,799.20 and 68,895.36 is: 103,447.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,459.36 : 108,799.20 = 68,895.36 : x
  2. Step 2: Convert to fraction form
    72,459.36/108,799.20 = 68,895.36/x
  3. Step 3: Cross multiply
    72,459.36x = 108,799.20 × 68,895.36
  4. Step 4: Simplify right side
    72,459.36x = 7,495,760,051.71
  5. Step 5: Solve for x
    x = 7,495,760,051.71/72,459.36
  6. Step 6: Final answer
    x = 103,447.78

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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.