Home / 75,269.11-112,979.27-66,890.47

Finding the Fourth Proportional to 75,269.11, 112,979.27 and 66,890.47

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Solution

The fourth proportional to 75,269.11, 112,979.27 and 66,890.47 is: 100,402.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,269.11 : 112,979.27 = 66,890.47 : x
  2. Step 2: Convert to fraction form
    75,269.11/112,979.27 = 66,890.47/x
  3. Step 3: Cross multiply
    75,269.11x = 112,979.27 × 66,890.47
  4. Step 4: Simplify right side
    75,269.11x = 7,557,236,136.10
  5. Step 5: Solve for x
    x = 7,557,236,136.10/75,269.11
  6. Step 6: Final answer
    x = 100,402.89

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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.