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Finding the Fourth Proportional to 70,720.44, 106,064.24 and 20,787.18

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Solution

The fourth proportional to 70,720.44, 106,064.24 and 20,787.18 is: 31,175.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,720.44 : 106,064.24 = 20,787.18 : x
  2. Step 2: Convert to fraction form
    70,720.44/106,064.24 = 20,787.18/x
  3. Step 3: Cross multiply
    70,720.44x = 106,064.24 × 20,787.18
  4. Step 4: Simplify right side
    70,720.44x = 2,204,776,344.51
  5. Step 5: Solve for x
    x = 2,204,776,344.51/70,720.44
  6. Step 6: Final answer
    x = 31,175.94

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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.