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Finding the Fourth Proportional to 67,317.80, 100,945.66 and 19,915.94

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Solution

The fourth proportional to 67,317.80, 100,945.66 and 19,915.94 is: 29,864.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,317.80 : 100,945.66 = 19,915.94 : x
  2. Step 2: Convert to fraction form
    67,317.80/100,945.66 = 19,915.94/x
  3. Step 3: Cross multiply
    67,317.80x = 100,945.66 × 19,915.94
  4. Step 4: Simplify right side
    67,317.80x = 2,010,427,437.85
  5. Step 5: Solve for x
    x = 2,010,427,437.85/67,317.80
  6. Step 6: Final answer
    x = 29,864.72

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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.