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Finding the Fourth Proportional to 99,635.60, 149,323.80 and 40,422.80

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Solution

The fourth proportional to 99,635.60, 149,323.80 and 40,422.80 is: 60,581.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,635.60 : 149,323.80 = 40,422.80 : x
  2. Step 2: Convert to fraction form
    99,635.60/149,323.80 = 40,422.80/x
  3. Step 3: Cross multiply
    99,635.60x = 149,323.80 × 40,422.80
  4. Step 4: Simplify right side
    99,635.60x = 6,036,086,102.64
  5. Step 5: Solve for x
    x = 6,036,086,102.64/99,635.60
  6. Step 6: Final answer
    x = 60,581.62

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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.