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Finding the Fourth Proportional to 111,871.58, 154,368.75 and 75,651.83

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Solution

The fourth proportional to 111,871.58, 154,368.75 and 75,651.83 is: 104,390.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,871.58 : 154,368.75 = 75,651.83 : x
  2. Step 2: Convert to fraction form
    111,871.58/154,368.75 = 75,651.83/x
  3. Step 3: Cross multiply
    111,871.58x = 154,368.75 × 75,651.83
  4. Step 4: Simplify right side
    111,871.58x = 11,678,278,432.31
  5. Step 5: Solve for x
    x = 11,678,278,432.31/111,871.58
  6. Step 6: Final answer
    x = 104,390.04

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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.