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Finding the Fourth Proportional to 87,066.60, 120,012.99 and 68,639.60

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Solution

The fourth proportional to 87,066.60, 120,012.99 and 68,639.60 is: 94,613.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,066.60 : 120,012.99 = 68,639.60 : x
  2. Step 2: Convert to fraction form
    87,066.60/120,012.99 = 68,639.60/x
  3. Step 3: Cross multiply
    87,066.60x = 120,012.99 × 68,639.60
  4. Step 4: Simplify right side
    87,066.60x = 8,237,644,057.14
  5. Step 5: Solve for x
    x = 8,237,644,057.14/87,066.60
  6. Step 6: Final answer
    x = 94,613.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.