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Finding the Fourth Proportional to 68,740.47, 103,108.82 and 21,992.67

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Solution

The fourth proportional to 68,740.47, 103,108.82 and 21,992.67 is: 32,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,740.47 : 103,108.82 = 21,992.67 : x
  2. Step 2: Convert to fraction form
    68,740.47/103,108.82 = 21,992.67/x
  3. Step 3: Cross multiply
    68,740.47x = 103,108.82 × 21,992.67
  4. Step 4: Simplify right side
    68,740.47x = 2,267,638,142.39
  5. Step 5: Solve for x
    x = 2,267,638,142.39/68,740.47
  6. Step 6: Final answer
    x = 32,988.40

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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.