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Finding the Fourth Proportional to 111,992.76, 154,550 and 61,691.76

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Solution

The fourth proportional to 111,992.76, 154,550 and 61,691.76 is: 85,134.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,992.76 : 154,550 = 61,691.76 : x
  2. Step 2: Convert to fraction form
    111,992.76/154,550 = 61,691.76/x
  3. Step 3: Cross multiply
    111,992.76x = 154,550 × 61,691.76
  4. Step 4: Simplify right side
    111,992.76x = 9,534,461,508
  5. Step 5: Solve for x
    x = 9,534,461,508/111,992.76
  6. Step 6: Final answer
    x = 85,134.62

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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.