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Finding the Fourth Proportional to 111,998.79, 154,558.35 and 61,697.79

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Solution

The fourth proportional to 111,998.79, 154,558.35 and 61,697.79 is: 85,142.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,998.79 : 154,558.35 = 61,697.79 : x
  2. Step 2: Convert to fraction form
    111,998.79/154,558.35 = 61,697.79/x
  3. Step 3: Cross multiply
    111,998.79x = 154,558.35 × 61,697.79
  4. Step 4: Simplify right side
    111,998.79x = 9,535,908,621.05
  5. Step 5: Solve for x
    x = 9,535,908,621.05/111,998.79
  6. Step 6: Final answer
    x = 85,142.96

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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.