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Finding the Fourth Proportional to 111,988.67, 154,544.37 and 61,687.67

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Solution

The fourth proportional to 111,988.67, 154,544.37 and 61,687.67 is: 85,128.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,988.67 : 154,544.37 = 61,687.67 : x
  2. Step 2: Convert to fraction form
    111,988.67/154,544.37 = 61,687.67/x
  3. Step 3: Cross multiply
    111,988.67x = 154,544.37 × 61,687.67
  4. Step 4: Simplify right side
    111,988.67x = 9,533,482,096.92
  5. Step 5: Solve for x
    x = 9,533,482,096.92/111,988.67
  6. Step 6: Final answer
    x = 85,128.99

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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.