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Finding the Fourth Proportional to 99,659.60, 149,479.68 and 40,498.80

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Solution

The fourth proportional to 99,659.60, 149,479.68 and 40,498.80 is: 60,744.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,659.60 : 149,479.68 = 40,498.80 : x
  2. Step 2: Convert to fraction form
    99,659.60/149,479.68 = 40,498.80/x
  3. Step 3: Cross multiply
    99,659.60x = 149,479.68 × 40,498.80
  4. Step 4: Simplify right side
    99,659.60x = 6,053,747,664.38
  5. Step 5: Solve for x
    x = 6,053,747,664.38/99,659.60
  6. Step 6: Final answer
    x = 60,744.25

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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.