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Finding the Fourth Proportional to 111,638.63, 154,063.74 and 61,337.63

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Solution

The fourth proportional to 111,638.63, 154,063.74 and 61,337.63 is: 84,647.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,638.63 : 154,063.74 = 61,337.63 : x
  2. Step 2: Convert to fraction form
    111,638.63/154,063.74 = 61,337.63/x
  3. Step 3: Cross multiply
    111,638.63x = 154,063.74 × 61,337.63
  4. Step 4: Simplify right side
    111,638.63x = 9,449,903,910.22
  5. Step 5: Solve for x
    x = 9,449,903,910.22/111,638.63
  6. Step 6: Final answer
    x = 84,647.26

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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.