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Finding the Fourth Proportional to 89,361.90, 123,311.70 and 51,113.70

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Solution

The fourth proportional to 89,361.90, 123,311.70 and 51,113.70 is: 70,532.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,361.90 : 123,311.70 = 51,113.70 : x
  2. Step 2: Convert to fraction form
    89,361.90/123,311.70 = 51,113.70/x
  3. Step 3: Cross multiply
    89,361.90x = 123,311.70 × 51,113.70
  4. Step 4: Simplify right side
    89,361.90x = 6,302,917,240.29
  5. Step 5: Solve for x
    x = 6,302,917,240.29/89,361.90
  6. Step 6: Final answer
    x = 70,532.49

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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.