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Finding the Fourth Proportional to 111,912.96, 154,435.32 and 64,133.04

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Solution

The fourth proportional to 111,912.96, 154,435.32 and 64,133.04 is: 88,500.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,912.96 : 154,435.32 = 64,133.04 : x
  2. Step 2: Convert to fraction form
    111,912.96/154,435.32 = 64,133.04/x
  3. Step 3: Cross multiply
    111,912.96x = 154,435.32 × 64,133.04
  4. Step 4: Simplify right side
    111,912.96x = 9,904,406,554.97
  5. Step 5: Solve for x
    x = 9,904,406,554.97/111,912.96
  6. Step 6: Final answer
    x = 88,500.98

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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.