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Finding the Fourth Proportional to 79,376.33, 109,539.19 and 45,385.46

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Solution

The fourth proportional to 79,376.33, 109,539.19 and 45,385.46 is: 62,631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,376.33 : 109,539.19 = 45,385.46 : x
  2. Step 2: Convert to fraction form
    79,376.33/109,539.19 = 45,385.46/x
  3. Step 3: Cross multiply
    79,376.33x = 109,539.19 × 45,385.46
  4. Step 4: Simplify right side
    79,376.33x = 4,971,486,035.21
  5. Step 5: Solve for x
    x = 4,971,486,035.21/79,376.33
  6. Step 6: Final answer
    x = 62,631.85

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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.