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Finding the Fourth Proportional to 52,436, 72,361.68 and 30,087.20

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Solution

The fourth proportional to 52,436, 72,361.68 and 30,087.20 is: 41,520.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,436 : 72,361.68 = 30,087.20 : x
  2. Step 2: Convert to fraction form
    52,436/72,361.68 = 30,087.20/x
  3. Step 3: Cross multiply
    52,436x = 72,361.68 × 30,087.20
  4. Step 4: Simplify right side
    52,436x = 2,177,160,338.50
  5. Step 5: Solve for x
    x = 2,177,160,338.50/52,436
  6. Step 6: Final answer
    x = 41,520.34

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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.