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Finding the Fourth Proportional to 99,329.60, 148,864.80 and 40,116.80

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Solution

The fourth proportional to 99,329.60, 148,864.80 and 40,116.80 is: 60,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,329.60 : 148,864.80 = 40,116.80 : x
  2. Step 2: Convert to fraction form
    99,329.60/148,864.80 = 40,116.80/x
  3. Step 3: Cross multiply
    99,329.60x = 148,864.80 × 40,116.80
  4. Step 4: Simplify right side
    99,329.60x = 5,971,979,408.64
  5. Step 5: Solve for x
    x = 5,971,979,408.64/99,329.60
  6. Step 6: Final answer
    x = 60,122.86

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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.