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Finding the Fourth Proportional to 66,138.94, 99,213.50 and 18,753.22

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Solution

The fourth proportional to 66,138.94, 99,213.50 and 18,753.22 is: 28,131.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,138.94 : 99,213.50 = 18,753.22 : x
  2. Step 2: Convert to fraction form
    66,138.94/99,213.50 = 18,753.22/x
  3. Step 3: Cross multiply
    66,138.94x = 99,213.50 × 18,753.22
  4. Step 4: Simplify right side
    66,138.94x = 1,860,572,592.47
  5. Step 5: Solve for x
    x = 1,860,572,592.47/66,138.94
  6. Step 6: Final answer
    x = 28,131.27

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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.