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Finding the Fourth Proportional to 54,438.40, 81,706.20 and 47,051.20

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Solution

The fourth proportional to 54,438.40, 81,706.20 and 47,051.20 is: 70,618.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,438.40 : 81,706.20 = 47,051.20 : x
  2. Step 2: Convert to fraction form
    54,438.40/81,706.20 = 47,051.20/x
  3. Step 3: Cross multiply
    54,438.40x = 81,706.20 × 47,051.20
  4. Step 4: Simplify right side
    54,438.40x = 3,844,374,757.44
  5. Step 5: Solve for x
    x = 3,844,374,757.44/54,438.40
  6. Step 6: Final answer
    x = 70,618.81

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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.