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Finding the Fourth Proportional to 66,410.88, 99,613.54 and 16,489.90

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Solution

The fourth proportional to 66,410.88, 99,613.54 and 16,489.90 is: 24,734.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,410.88 : 99,613.54 = 16,489.90 : x
  2. Step 2: Convert to fraction form
    66,410.88/99,613.54 = 16,489.90/x
  3. Step 3: Cross multiply
    66,410.88x = 99,613.54 × 16,489.90
  4. Step 4: Simplify right side
    66,410.88x = 1,642,617,313.25
  5. Step 5: Solve for x
    x = 1,642,617,313.25/66,410.88
  6. Step 6: Final answer
    x = 24,734.16

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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.