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Finding the Fourth Proportional to 68,658.09, 102,988.95 and 21,910.98

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Solution

The fourth proportional to 68,658.09, 102,988.95 and 21,910.98 is: 32,867.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,658.09 : 102,988.95 = 21,910.98 : x
  2. Step 2: Convert to fraction form
    68,658.09/102,988.95 = 21,910.98/x
  3. Step 3: Cross multiply
    68,658.09x = 102,988.95 × 21,910.98
  4. Step 4: Simplify right side
    68,658.09x = 2,256,588,823.67
  5. Step 5: Solve for x
    x = 2,256,588,823.67/68,658.09
  6. Step 6: Final answer
    x = 32,867.05

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1.5x scale

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.