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Finding the Fourth Proportional to 105,538.30, 158,537.85 and 74,434.30

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Solution

The fourth proportional to 105,538.30, 158,537.85 and 74,434.30 is: 111,813.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,538.30 : 158,537.85 = 74,434.30 : x
  2. Step 2: Convert to fraction form
    105,538.30/158,537.85 = 74,434.30/x
  3. Step 3: Cross multiply
    105,538.30x = 158,537.85 × 74,434.30
  4. Step 4: Simplify right side
    105,538.30x = 11,800,653,888.26
  5. Step 5: Solve for x
    x = 11,800,653,888.26/105,538.30
  6. Step 6: Final answer
    x = 111,813.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.