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Finding the Fourth Proportional to 60,546.90, 90,820.87 and 21,103.95

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Solution

The fourth proportional to 60,546.90, 90,820.87 and 21,103.95 is: 31,656.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,546.90 : 90,820.87 = 21,103.95 : x
  2. Step 2: Convert to fraction form
    60,546.90/90,820.87 = 21,103.95/x
  3. Step 3: Cross multiply
    60,546.90x = 90,820.87 × 21,103.95
  4. Step 4: Simplify right side
    60,546.90x = 1,916,679,099.44
  5. Step 5: Solve for x
    x = 1,916,679,099.44/60,546.90
  6. Step 6: Final answer
    x = 31,656.11

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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.