Home / 67,916.25-101,880-21,169.13

Finding the Fourth Proportional to 67,916.25, 101,880 and 21,169.13

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Solution

The fourth proportional to 67,916.25, 101,880 and 21,169.13 is: 31,755.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,916.25 : 101,880 = 21,169.13 : x
  2. Step 2: Convert to fraction form
    67,916.25/101,880 = 21,169.13/x
  3. Step 3: Cross multiply
    67,916.25x = 101,880 × 21,169.13
  4. Step 4: Simplify right side
    67,916.25x = 2,156,710,455
  5. Step 5: Solve for x
    x = 2,156,710,455/67,916.25
  6. Step 6: Final answer
    x = 31,755.44

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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.