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Finding the Fourth Proportional to 72,799.76, 100,455.42 and 40,967.84

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Solution

The fourth proportional to 72,799.76, 100,455.42 and 40,967.84 is: 56,530.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,799.76 : 100,455.42 = 40,967.84 : x
  2. Step 2: Convert to fraction form
    72,799.76/100,455.42 = 40,967.84/x
  3. Step 3: Cross multiply
    72,799.76x = 100,455.42 × 40,967.84
  4. Step 4: Simplify right side
    72,799.76x = 4,115,441,573.69
  5. Step 5: Solve for x
    x = 4,115,441,573.69/72,799.76
  6. Step 6: Final answer
    x = 56,530.98

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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.