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Finding the Fourth Proportional to 111,820, 154,311.60 and 61,517.92

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Solution

The fourth proportional to 111,820, 154,311.60 and 61,517.92 is: 84,894.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,820 : 154,311.60 = 61,517.92 : x
  2. Step 2: Convert to fraction form
    111,820/154,311.60 = 61,517.92/x
  3. Step 3: Cross multiply
    111,820x = 154,311.60 × 61,517.92
  4. Step 4: Simplify right side
    111,820x = 9,492,928,663.87
  5. Step 5: Solve for x
    x = 9,492,928,663.87/111,820
  6. Step 6: Final answer
    x = 84,894.73

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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.