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Finding the Fourth Proportional to 67,658.98, 101,498.19 and 20,915.50

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Solution

The fourth proportional to 67,658.98, 101,498.19 and 20,915.50 is: 31,376.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,658.98 : 101,498.19 = 20,915.50 : x
  2. Step 2: Convert to fraction form
    67,658.98/101,498.19 = 20,915.50/x
  3. Step 3: Cross multiply
    67,658.98x = 101,498.19 × 20,915.50
  4. Step 4: Simplify right side
    67,658.98x = 2,122,885,392.95
  5. Step 5: Solve for x
    x = 2,122,885,392.95/67,658.98
  6. Step 6: Final answer
    x = 31,376.25

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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.